Gem

Luigi collecting an amethyst in the Parlor in the Gloomy Manor

Gems, also referred to as gemstones, are valuable objects found in Luigi's Mansion: Dark Moon and Luigi's Mansion 3. They bear a resemblance to Stones from the preceding game, Luigi's Mansion, though these items serve as collectibles rather than containing a value of gold. In Luigi's Mansion: Dark Moon, there are thirteen gems hidden in each of the five mansions in the game, making a grand total of 65 gems in the entire game. Amethysts are found in the Gloomy Manor, emeralds are found in the Haunted Towers, rubies are found in the Old Clockworks, sapphires are found in the Secret Mine, and diamonds are found in the Treacherous Mansion. The coloration of the five sets of thirteen gems corresponds to the theme of the five mansions. Some gems can be obtained in any mission, while some can be obtained only in a specific mission or once certain conditions have been met.

Once the player has collected all thirteen gems in a mansion, they are rewarded with one of five different statues of Luigi with the gems encrusted in the stand. The player can see the gems they have collected inside the Vault, on the mansion-selection screen, when one is collected in a mansion, and when the totals and records are displayed at the end of a mission. Any statues that have been unlocked can be viewed only inside the Vault.

In Luigi's Mansion 3, there are six gems on each floor: one white, one red, one blue, one green, one purple, and one yellow. The gems are a different shape depending on the floor. They are shaped like cubes in the Basement, diamonds in the Grand Lobby, rectangular prisms in the RIP Suites, ovals in the Mezzanine, teardrops in the Hotel Shops, quavers in The Great Stage, swords in Castle MacFrights, flowers in the Garden Suites, film reels in Paranormal Productions, dinosaur claws in the Unnatural History Museum, wrenches in the Boilerworks, snakes in the Tomb Suites, dice in the Twisted Suites, skulls and crossbones in The Spectral Catch, dumbbells in the Fitness Center, headphones in The Dance Hall, and King Boo in the Master Suite.

Once all the gems are collected on all floors, the player unlocks Suction Shot Type-C.

Luigi's Mansion: Dark Moon

Amethysts (Gloomy Manor)

Shape	Available mission(s)	Location and how to get the gem
Round	Every mission (except boss) and bonus	Mudroom Exterior – In the Mudroom, the player should use their Strobulb on the right door to open it. Once outside, they need to vacuum this gem down from the tree at the end of the path.
Triangle		Front Yard – The player should use the Strobulb on the flowers.
Baguette	A-2 to A-5 and bonus	Parlor – The player should use the Strobulb on the grandfather clock.
Football		Studio – The player should look into the camera to notice the gem hidden behind the leftmost curtains and a spiderweb.
Drop	A-3 and bonus	Entrance – The player should press near the right suit of armor to knock down its helmet. The player can then use the helmet to hit a painting on the left wall.
Pebble	A-3 to A-5 and bonus	Dining Room – The player needs to use the Strobulb on a safe in the ceiling.
Rhombus		Kitchen – The player should interact with the stove (walk up to it and press ) in order to start a fire. Then, the player should open the fridge to reveal this gem frozen in ice. The player can melt the ice with the stove's open flames.
Star		Foyer – In the Common Hall, the player should go to the end of the hall and use the Dark-Light Device to reveal a hidden door. The door leads to the Patio. In the Patio, the player can reveal another door along the left wall by using the Dark-Light Device. The player should enter the door to be in a new area (Under the Stairs). The player should then take the door on the left to be taken to the Foyer (behind the fish tank), where the amethyst can be found.
Octagon		Patio – The player should use the Dark-Light Device to reveal a hidden fountain next to the other two in the water.
Oval	A-4 to A-5 and bonus	Library – The player should use the Dark-Light Device to reveal a hidden globe along the left wall. The player can then shoot the globe out of the Poltergust 5000 to reveal the gem.
Spindle	A-2 to A-5 and bonus	Study – The player needs to pull down the leftmost curtains on the back wall. The player then needs to shine the Dark-Light Device on the painting to reveal the gem.
Coffin	A-5 and bonus	Rafters – This gem is on top of a dresser on the far right side of the area. The player can vacuum the gem down easily.
Mushroom		Bedroom – The player needs to burn the giant web, then go behind it to find this amethyst.

Emeralds (Haunted Towers)

Shape	Available mission(s)	Location and how to get the gem
Round	Every mission (except boss) and bonus	Tower Lobby – On the left side of the area, the player can walk behind the stairs to find the emerald.
Triangle	B-1 and bonus	Laboratories – The player should use a bulb to float into the test tubes on the left, then vacuum the cobwebs holding the emerald.
Baguette	B-2 to B-5 and bonus	Garden – The player should fill up a bucket with water, then use it to water the flower on the right wall. After the flower grows, the player should use their Strobulb on it to reveal this emerald.
Football		Botany Lab – The player should fill up the bucket (in this room) with water, then use it to water the flower on the back wall. After the flower grows, the player should use their Strobulb on it to reveal this emerald.
Drop		Seedling Laboratory – After defeating all the ghosts in this room, the player should use the seed shooter to shoot the mouse carrying this emerald.
Pebble		Tower Lobby/Maintenance/West Garden – In the Tower Lobby, the player needs to reveal some invisible pipes on the left wall by using the Dark-Light Device. After that, the player needs to reveal a hidden door (with the Dark-Light Device) next to the left one on the bottom floor. Inside, the player needs to use a spiky fruit to defeat the flytrap and access the emerald.
Rhombus	B-3 and bonus	Hollow Tree – After climbing to the top and falling back down, the player needs to light up a ball of silk and use it to burn the cobwebs on the left side. Behind the web is a bucket, which the player can fill using the water in the middle of the room. The player needs to take the filled bucket to the right side and water a flower. After it has grown, the player needs to use the Strobulb on it to reveal the emerald.
Star	B-3 to B-5 and bonus	Old Graveyard – The emerald is sitting on a tree branch on the left side of the area. The player must use the vacuum to grab the emerald.
Octagon	B-4 and bonus	Skybridge – The player needs to vacuum the third plant hanging in order to get this emerald.
Oval		Rumpus Room – The player needs to walk around the doll counterclockwise in order to reveal the emerald.
Spindle	B-4 to B-5 and bonus	Solarium – The player needs to use the Dark-Light Device to reveal a chest hidden on the table.
Coffin	B-4 only	Conservatory – The player should use a bulb to float to a balcony to the right, then the player needs to use the Dark-Light Device to reveal a hidden door. When the player enters, they are taken to a bonus challenge, and the goal is to collect all eight Red Coins within 15 seconds. Upon the player doing so, a chest containing the emerald appears.
Mushroom	B-4 to B-5 and bonus	West Bathroom – After defeating all the ghosts in this room, the player should pull on the toilet paper roll on the left wall to reveal this emerald.

Rubies (Old Clockworks)

Shape	Available mission(s)	Location and how to get the gem
Round	C-1 to C-4 and bonus	Clockworks Court – The player needs to go all the way to the right side of the area, then they need to use the Dark-Light Device to reveal a toolbox containing this ruby.
Triangle		Warehouse – The player needs to use the Dark-Light Device to reveal a hidden green spool on top of the boxes, then they need to unravel it by using the machine in this room.
Baguette	C-1 to C-4, boss, and bonus	Clock Tower Gate – The player needs to use the Dark-Light Device to reveal a hidden toolbox in the top left corner of the room.
Football	C-2 to C-4 and bonus	Storm Cellar – The player needs to vacuum a sheet in the bottom left corner to reveal a painting. The player should use the Dark-Light Device on it to reveal the ruby.
Drop		Canyon Hall/Canyon Stairs – In the Canyon Hall, the player should take a detour down a secret passageway on the right. There is a door that leads to the Canyon Stairs. The player should notice the gem stuck on a cobweb along the right wall. The player should use the vacuum to get the ruby.
Pebble	C-2 and bonus	Quarry – The player needs to pull on the minecart twice to reveal a hole behind it. The player should go into this hole to find the ruby.
Rhombus	C-3 only	Clockmaker's Chambers – The player needs to vacuum the rug to reveal a gear. The player needs to vacuum up/blow on the gear to set the alarm clock to 9:00. Upon the player doing so, a ghost (holding the ruby) wakes up. The player must defeat the ghost to obtain this ruby.
Star	C-3 to C-4 and bonus	Roundhouse (Upper) – The player needs to cross the beams located in the middle of the walkway along the back balcony. They should then follow this walkway to find a toolbox containing this ruby.
Octagon		Roundhouse (Lower) – The player needs to use the door in the Transportation Hall that leads to the Roundhouse. After going down the first set of stairs, the player needs to continue going left into a secret area containing the ruby.
Oval	C-5 only	Gear Chamber – The player needs to cross the boxes along the right wall. (Luigi needs to reveal some of them by using the Dark-Light Device.) This leads to a hidden door containing a bonus challenge, where the player must collect eight Red Coins within 15 seconds. Upon the player doing so, a chest containing this ruby appears.
Spindle	C-5 and bonus	Maintenance Hub – The player needs to use the Strobulb on the mechanism along the wall. This causes a rope to appear. The player should grab the rope and fall into the pit below. The player should use the Dark-Light Device to reveal a chest in the center of the area, which contains this ruby.
Coffin	C-5 only	Service Elevator – After leading the Toad here, the player should pick him up and launch him toward the bottom right corner of the area. The Toad lands on a walkway, where he grabs the ruby.
Mushroom	Boss and bonus	Movements – The player needs to walk up to the window on the left, then vacuum the ruby to acquire it.

Sapphires (Secret Mine)

Shape	Available mission(s)	Location and how to get the gem
Round	Every mission (except boss) and bonus	Smokehouse – The player needs to use the Dark-Light Device to reveal a missing scarf, then the player needs to pull both of the scarves to reveal the sapphire.
Triangle		Fishing Hut – The gem is hidden in the bottom left corner of the room. The player needs to use the vacuum to get this sapphire.
Baguette	D-1 only	Under the Ice – After falling down here, the player needs to pick up the Toad and launch him into the shaft on the upper balcony.
Football	Every mission (except boss) and bonus	High Wires – The player needs to use the cables to cross the ravine, then the player needs to vacuum the sapphire down from the bird's nest.
Drop		Airway – The player needs to enter the Airway via the Terminal. Then, the player needs to look into the telescope and spot the sapphire being taken to a barrel on the lower area. The player needs to get to the barrel and look inside to find the sapphire.
Pebble	D-2 to D-3 and bonus	Chalet Approach – The player needs to use a flaming turkey (left of the door) to burn the ice surrounding the painting in front of the snowman. Then, the player needs to use the Dark-Light Device on the painting to reveal the sapphire.
Rhombus		Prospector's Crossing – The player needs to use the Dark-Light Device to reveal an axe in the bottom right corner of the room. After exposing it, the player needs to use their vacuum on it to reveal two logs. The player must place the two logs and Luigi on the ice to get the sapphire.
Star		Skip Slope – While sliding down the slope, the player may notice a big spinning wheel to the left. The player needs to slide behind the wheel to get this sapphire.
Octagon		Shaft – At the bottom of the Shaft, the player may notice a chain hanging on the wall. The player needs to pull the chain, opening a hatch farther up the Shaft. The player must then climb back up the Shaft to get this sapphire.
Oval		Deep Hall – The player must light a piece of coal and shoot it at the sapphire located above the door leading to the Crystal Quarry.
Spindle	D-3 and bonus	Crossroads – The player must use the Dark-Light Device to reveal a hidden minecart on the left wall. After exposing it, the player must vacuum the snow in order to get this sapphire.
Coffin		Crystal Quarry/Chalet – The player needs to use the portal located in the Crystal Quarry, which takes them to the Chalet, and the sapphire is exposed.
Mushroom	D-3 only	High Wires – The player needs to use the Coal Shooter in the Gondola to melt the ice supporting a tree on the left. After the tree falls, the player can cross it to find an outhouse, which contains a bonus challenge. The goal is to shoot a snowball at each of the three Hiders in under 60 seconds. Upon the player doing so, the sapphire is revealed.

Diamonds (Treacherous Mansion)

Shape	Available mission(s)	Location and how to get the gem
Round	E-1 and bonus	Underground Lab – The player needs to spin the wheel to zap the armor, then launch the helmet at the glass jar on the wall.
Triangle		Haunted Catacombs – The player should burn the webs in the second half of the Haunted Catacombs.
Baguette		Haunted Catacombs/Cliffside – The player must reach the Cliffside's B2 level and vacuum the gem down from the vine.
Football	E-2 to E-3, E-5, and bonus	Front Entrance – The player needs to use the Dark-Light Device to reveal the missing chain attached to the gargoyle. After that, the player should pull that chain, then open the safe under the stairs.
Drop		Restrooms – The player should pull the chain in the west half of the Restrooms.
Pebble	E-2 and bonus	Ice Age Exhibit/Gargoyle Roof – The player needs to launch the stars into the constellation's empty slots.
Rhombus	E-2 to E-3, E-5, and bonus	Ancient Exhibit – The player should water the sprout near the door, then flash the purple flower with the Strobulb.
Star	E-3, E-5, and bonus	Aviation Exhibit – The player must pull each of the hot air balloon's sandbags.
Octagon		Nautical Exhibit – The player needs to open the chest at the end of the pirate ship.
Oval		Front Entrance/Dark Age Exhibit – The player needs to place the blue book from the Front Entrance into the slot on the bookcase.
Spindle	E-3 only	Jungle Exhibit – The player should use the gold bulb to collect the coins that appear, then open the revealed chest.
Coffin		Ice Age Exhibit – The player should use the gold bulb to collect the coins that appear, then open the revealed chest.
Mushroom	E-3, E-5, and bonus	Train Exhibit – The player needs to use the Dark-Light Device to reveal the missing piece of the track, then ride the train around the room.

Luigi's Mansion 3

B1 (Basement)

Gem	Room	How to get the gem
	Garage	Next to the red car where Luigi finds the Poltergust G-00, there is a car covered by a tapestry. The player should pull the tapestry off to reveal a blue car with a Strobulb terminal. The player should flash the terminal, and the gem pops out of the trunk.
		On the far left, the player should use Gooigi to go through the fence and use the Suction Shot to open the electric supply box, inside of which he must flash the Strobulb to release the gem.
	Elevator Shaft	In the garage, through a vent next to the red car that must be opened with the Suction Shot, Luigi must climb the ladder to the elevator shaft, then have Gooigi drop through a grate to the layer where the gem resides.
	Laundry Room	The gem can be seen in the washing machine. The player must simply aim the plunger at the machine and pull the door off to get the gem.
	Service Hallway	The player must shine their Dark-Light Device on a painting to receive the gem.
	Service Stairwell	In front of the door to the Grand Lobby is a grate that Gooigi must drop down through to reach the gem.

1 (Grand Lobby)

Gem	How to get the gem
	In the area to the left of the main area, there is a couch missing. The player has to use the Dark-Light Device to reveal the couch. Upon the player revealing the couch, a Gem Goob appears. The player has to defeat the Gem Goob to collect the gem.
	To the left of the elevator, there is a picture of the hotel. The player has to use the Suction Shot on the gear on the front of the table to reveal the gem behind the painting.
	On the second level in the left corner of the lobby, the player needs to roll the carpet up to reveal some grates. The player must then use Gooigi to slip through the grates and behind the gem. Gooigi must use a Burst to blow the gem from the wall.
	Upon the player exiting the elevator, there is a pot with the gem inside on the right. The player must use the Suction Shot on the pot to free the gem.
	In the main area behind the front desk, there is a Strobulb terminal. The player has to flash the terminal to acquire the gem.
	In the main area, there are two pressure plates near the gargoyles. The player needs to use Gooigi and Luigi to activate both pressure plates to lower the chandelier. Both must then vacuum the chandelier together to make it spin and cause the gem to suddenly drop.

5 (RIP Suites)

Gem	Room	How to get the gem
	508 Balcony	Luigi must look into the telescope until a Gem Goob appears. Defeating it releases the gem.
	501 Balcony	In Princess Peach's room, Luigi must use the Dark-Light Device to reveal a door right of the wardrobe, leading to the balcony. Heading right leads to a gargoyle with the gem in its mouth.
	Laundry Room	To the far right of the elevator is a room blocked by a vending machine, which Luigi must remove using the Suction Shot. Inside this room, Luigi must use the Suction Shot to open a shaft in the top left corner, inside of which is the gem.
	Hallway	In the right hallway, Luigi must launch a ball from a statue to a demon head, releasing a gem.
	507 Bathroom	Luigi should clear a tapestry in the top left, then clear some debris with the Suction Shot in the following room to reach the gem.
	502 Bathroom	Luigi should remove the shower curtain, and Gooigi should drop through the grate, use the Suction Shot to clear planks of wood, and then turn the valve. Luigi should then turn on the shower to cause a box to come out of the bathtub. Destroying the box releases the gem.

3 (Hotel Shops)

Gem	Room	How to get the gem
	Elevator Hall	In the mall, Luigi should go through a gate above the bottom right shop, then follow the path to a chest containing the gem.
	Boutique	Gooigi should use the Suction Shot on a mannequin on the left, opening a secret door. Inside, Gooigi should vacuum the gem from the wall.
	Hallway	Right outside Kruller's office is a vending machine, which, if flashed with the Strobulb multiple times, will release the gem.
	Mall Lobby	At the top left, Luigi should use the Dark-Light Device to reveal a ladder on the left. Climbing it and following the path leads to a chest containing the gem.
	Restroom	Luigi should use the Dark-Light Device to reveal a grate that Gooigi should drop down through so he can turn off a valve, then he should be recalled and sent through a grate in the left wall. The gem is in the cubicle on the left.
	Accessories	Gooigi should slam a suitcase into the middle glass.

2 (Mezzanine)

Gem	Room	How to get the gem
	Restroom	Inside the restroom on the right, Luigi should open the cubicle on the right and vacuum the newspaper, causing a Gem Goob to appear.
	Ballroom	Luigi should vacuum the chandelier to open a room on the left, inside of which is the gem.
	Kitchen	Luigi should open the left freezer, inside of which under the shelves on the left is a block of ice containing the gem. Luigi can melt the ice by holding it over the stove.
	Dressing Room	In the room left of where the Dark-Light Device was obtained, Luigi should vacuum some clothes on the left, behind which is a safe containing the gem, which is opened with the Strobulb.
	Entertainment Room	Luigi should launch a sword onto the dartboard.
	Hallway	In front of the door to the Restaurant, Luigi should use the Suction Shot to destroy the menu sign, then vacuum one fan and have Gooigi vacuum the other at the same time.

4 (The Great Stage)

Gem	Room	How to get the gem
	Restroom	In the restroom on the left, Luigi should use the Dark-Light Device to reveal a tap, and turning it on causes a Gem Goob to appear.
	Dressing Room	Luigi should use the Dark-Light Device on the piano to reveal some piano keys, then he must play it.
	Concession Stand	In the restroom on the right, Gooigi should go through the gate and pull on the chain to make the Boo door accessible. Luigi should go through, and in the following room, he should blow on the tops of the bottles from left to right to open a safe containing the gem.
	Auditorium	This gem cannot be obtained until the Super Suction is unlocked much later in the game. On the stage, Luigi should use a Burst on a square in front of the portrait Toad was trapped in, causing a socket to come out. Luigi should use the Super Suction to pull away the back wall to reveal a hidden room, inside of which is a TV that leads to one of the stands where Luigi should use a Burst.
	Elevator Hall	Outside the elevator, Luigi should blow on the tuba, and Gooigi should retrieve the gem.
		On the far left, Luigi should keep flashing the popcorn stand with the Strobulb until it explodes.

6 (Castle MacFrights)

Gem	Room	How to get the gem
	Coliseum Balcony	On the path back to the elevator unlocked after King MacFrights is defeated, Luigi should vacuum a suit of armor to reveal a gem.
	Hall of Armor	Luigi should use the Dark-Light Device to reveal a suit of armor in the top right alcove. Destroying it with the Suction Shot releases the gem.
	Cellar	Luigi should use the Suction Shot to open the barrel on the right, then walk through the opening inside the barrel to a ladder, at the top of which is the gem.
	Royal Coffers	In the Coliseum Hallway, Luigi should vacuum the last tapestry and use the Dark-Light Device to reveal a door, inside of which is the Royal Coffers.
	Armory	Luigi should use the Suction Shot on the loose stones, revealing a chest containing the gem.
	Cage-Lift Room	At the bottom of the room, Luigi should vacuum a fan on the left wall to lower a cage containing the gem, which Gooigi can walk through.

7 (Garden Suites)

Gem	Room	How to get the gem
	Ivy Bathroom	Luigi should turn on the tap in the bathtub, then Gooigi should drop down through the grate and use the Dark-Light Device to reveal a hidden part of the drainpipe and water a flower. Flashing the flower with the Strobulb reveals the gem.
	Blooming Suite	In the first bedroom, Luigi should vacuum some leaves south of the bed, then use the Suction Shot to open a shaft that Gooigi can enter, leading to the top of the bed where there is a flower, which releases the gem after being flashed with the Strobulb.
	Atrium	On the top of the giant plant, Luigi should vacuum on the left of it to extend a branch, then vacuum some leaves to clear a path leading to the gem.
	Mushroom Suite	Luigi should walk along the roots going over the bed, leading to an area under the bedroom. Towards the back is a pipe that Gooigi can enter, leading to a flower that, if flashed with the Strobulb, will reveal the gem.
	Blooming Bathroom	Luigi should clear the pile nearest to the toilet to reveal a grate that Gooigi can drop down through. In the following area, Gooigi should vacuum some leaves in the top right to clear a pipe that he must go through to enter the bathtub, and clearing the rose petals reveals the gem.
	Elevator Hall	Around the corner of the elevator, Luigi should use the Dark-Light Device under the painting on the right to reveal the gem, then vacuum it.

8 (Paranormal Productions)

Gem	Room	How to get the gem
	Studio 3: Fire Set	Luigi should vacuum the scarf off the bicycle on the right, causing a Gem Goob to appear.
	Studio Entrance	In the room leading to the backstage, Luigi should vacuum the carpet under the TV from the bottom left corner, destroying a plant with the Suction Shot beforehand.
	Backstage	Luigi should go to the rafters by using Gooigi to operate the lift from below. In the rafters is a block of ice containing the gem, which can be melted by using the torch from the Castle Set. Alternatively, before the cameras become unusable, Gooigi can melt the ice block in the Fire Set.
	Studio 4: Micro Set	Gooigi should enter the bottle from where the top is.
	Elevator Hall	Luigi should lower the helicopter by using the Poltergust G-00.
	Studio Entrance	Luigi should pull on the film reel on the reception desk to release the gem behind the desk, which Gooigi must retrieve.

9 (Unnatural History Museum)

All six gems are found in the Elevator Hall.

Gem	How to get the gem
	In the bottom right, Luigi must use either Toad or a bone rib to break the glass container, causing a Gem Goob to appear.
	South of the elevator is a desk. Luigi can blow on the chair to rotate the desk, and in its place, a chest containing the gem appears.
	In the left hall, Luigi should vacuum some plants to reveal a green light that can be flashed with the Strobulb, opening the fossil up ahead and revealing a safe that can also be opened with the Strobulb.
	Luigi must break the pterosaur bones above the elevator with either Toad or a bone rib.
	In the bottom left, Luigi must use either Toad or a bone rib to break the glass container, then use the Dark-Light Device to reveal the gem.
	To the right of the curtain, Luigi must use either Toad or a bone rib to break the glass container.

B2 (Boilerworks)

Gem	Room	How to get the gem
	Old Reservoir	This gem cannot be obtained until Luigi returns to the Boilerworks to rescue Toad and find the Super Suction upgrade. In the top left of the lower area, Luigi must throw some buckets of paint on the wall to make a Gem Goob appear.
	Storage Room	Gooigi should go through the left pipe (obstructed by a yellow box), then go through the next pipe, and Luigi should turn the valve to stop the water blocking the gem.
	Observation	Luigi should use the Dark-Light Device to reveal a boiler, then he must flash the Strobulb on the coffee machine.
	Sewer B	After the water has been drained, in the bottom right, either Luigi or Gooigi should pull on a chain, while the other takes a platform to the top where they can vacuum the gem.
	Sewer C	After the water has been drained, Gooigi should enter a pipe above a piece of cracked floor to enter a submarine. Inside, he should use a burning piece of wood on the stove.
	Elevator Hall	Just before the door to the Waterworks, Gooigi should enter the middle pipe (obstructed by a fake wall that can be removed by vacuuming it) and then walk left to the gem.

10 (Tomb Suites)

Gem	Room	How to get the gem
	Central Chamber	Luigi should use the Suction Shot to break open a tomb nearest to the right door to reveal a smaller one. Luigi should keep breaking these until a Gem Goob appears.
	Elevator Hall	In the hallway with the elevator, right of the door to the pyramid area, Luigi should pull on a chain near the snake statue to open its mouth, and Gooigi should retrieve the gem.
	Jewel Chamber	Luigi should use the Suction Shot to break a pot in the top left of the room to reveal an "X" shape key like those used to stop the poison. Luigi should place this "X" in the small room with the door on the left wall.
	Scale Chamber	After the player defeats the ghosts that appear after the trap is cleared, a piece of the floor cracks to reveal a grate that Gooigi can drop down through. The following room has a chest containing the gem.
	Sandy Grand Hall	Luigi should vacuum the biggest sand dune on the left of the pyramid.
		Luigi should use the Dark-Light Device to reveal the two missing segments of the snake statue on the right of the pyramid.

11 (Twisted Suites)

Gem	Room	How to get the gem
	Suit Bathroom	Luigi should vacuum all the cards in the room, lighting up the lamp.
	Bladed Bedroom	Luigi should rotate the giant wheel to have swords fly into it. The gem appears after the swords form a square.
	Trainer's Bedroom	The player obtains this gem by destroying the three piggy banks distributed around the room: one on the bed, one on top of the safe, and one at the southwestern corner of the room.
	Lounge	Luigi should use the Suction Shot to open the panel right of the stage, then flash it with the Strobulb to briefly open the windows. The gem is in a window on the other side of the room; therefore, Gooigi should be placed there when the windows open to obtain the gem in time.
	Hall	Luigi should blow the giant hat onto the statues of Nikki, Lindsey, & Ginny, more specifically on the one who is not wearing a hat. Some stairs appear, leading to a chest containing the gem.
	Mirror Bathroom	The mirror shows a painting with the gem in the bottom of the room. Using the Dark-Light Device releases the gem from the painting.

12 (The Spectral Catch)

Gem	Room	How to get the gem
	Grotto Lounge	Luigi should use the Dark-Light Device to reveal a flag in the bottom left of the room, then pull on the string under it to raise it to the top.
	Beach	The player obtains this gem by shooting three coconuts at the mermaid statue on the left to make a Gem Goob appear.
	Elevator Hall	Luigi should use the Super Suction to pull away the carpet in front of the door to the cave, and a Burst over the large red "X" that appears.
	Beach	On the right of the beach, Luigi should use the Dark-Light Device to reveal two bridges to some smaller islands. On the farthest island, Luigi should vacuum the sand to find a chest containing the gem. A hint of this gem's location is given on a map on the ship near where the Toad is rescued.
		This gem is beneath the sand on the first of the smaller islands leading to the green gem.
	Elevator Hall	Luigi should use the Super Suction to clear a piece of the wall left of the door to the cave, revealing a pipe that Gooigi can go through. This leads behind the desk, where Gooigi can obtain a globe and launch it to the other side of the desk. Luigi should launch the globe at the right hanging ball of the three in front of the elevator.

13 (Fitness Center)

Gem	Room	How to get the gem
	Gym Lobby	Luigi should use the Dark-Light Device to reveal a bell on the desk, then as he approaches the left door, the bell rings in a certain pattern. Luigi should ring the bell in the same pattern to make a Gem Goob appear.
	Weight Room	Luigi should stand on the scale in the bottom right corner, then he should remain there while Gooigi retrieves the gem from a panel visible in the mirror.
	Locker Room	Luigi should launch a boxing glove at the pool sign.
	Shower Room	Gooigi should drop down through the grate, then turn the valve on the right to drain the water and go through the grate on the right.
	Training Room	Luigi should flash the Strobulb on the radio three times (a hint on this is given by a phone call in the Elevator Hall) to turn it to "channel 3." After the room goes darker, Luigi should use either the Strobulb or the Dark-Light Device on the treadmills to reveal three ghosts, two of which are Golden Goobs, while the last one is a Gem Goob.
	Elevator Hall	Both Luigi and Gooigi should stand on the circle in the center to fully open the window on the right, then while remaining there, one of them should vacuum the gem.

14 (The Dance Hall)

Gem	Room	How to get the gem
	Dance Floor	Luigi and Gooigi should stand on the non-glowing platforms at the same time to uncover a socket for Super Suction. In the back room revealed with Super Suction, Luigi should flash the left hanging record with the Strobulb to make some stairs appear on both sides of the room. On the upper left layer, Luigi should use the Dark-Light Device to reveal a table, making a Gem Goob appear.
		After releasing the stairs to the upper layers, Luigi and Gooigi should blow on the large records on each side at the same time, causing the disco ball to fall on the dance floor.
		In the back room revealed with Super Suction, Luigi should use the Dark-Light Device on the mannequin head on the right that lacks an afro, to reveal its afro, then vacuum it.
	Elevator Hall	Luigi should use a Burst to enter the coatroom. He should vacuum all the coats on the left to make the isle rise.
		Left of the elevator, Luigi should vacuum the records on the wall while Gooigi repeatedly uses a Burst under the square that comes out until it turns into an Empty Block.
		In front of the elevator, Luigi should walk along the non-lit squares on the mini-dance floor to light them (standing on lit ones turns them off, and walking off the dance floor resets it), then he and Gooigi should stand on the non-lit ones at the same time a few times to turn the dance floor into a set of stairs leading to the hidden vault, where a chest containing the gem is behind some bars Gooigi can walk through.

15 (Master Suite)

Gem	Room	How to get the gem
	Hallway	In the hall, left of the elevator room, Luigi should rotate the statue until its shadow aligns with the King Boo painting, then the Luigi painting.
	Library	At the bottom of the room, Luigi should walk left to find a hidden area, where he can find a book he can carry with the Poltergust G-00. Luigi should take the book to the bookcase right of where the room's key is found and place it in the missing spot.
	Master Bathroom	Gooigi should drop down through the grate in front of the shower, go in the alcove opposite where there is a King Boo shadow (which is actually the gem), and then go through the pipe to reach the gem.
	Lounge	Luigi and Gooigi should stand on the tables on each side of the big couch at the same time.
		Gooigi should enter a pipe left of the door to the hall, then fall down the black alcove.
	Master Bedroom	Gooigi should use the pendulum platform to reach the gem, which is near the top of the room and behind some bars he can go through.

Profiles

Luigi's Mansion: Dark Moon

• Instruction manual bio: "If you collect all the gems, something neat may happen!"

Names in other languages

Language	Name	Meaning	Notes
Japanese	アメジスト Amejisuto エメラルド Emerarudo ルビー Rubī サファイア Safaia ダイヤモンド Daiyamondo[?]	Amethyst Emerald Ruby Sapphire Diamond
Chinese	紫水晶 Zǐshuǐjīng 绿宝石／綠寶石 Lǜbǎoshí 红宝石／紅寶石 Hóngbǎoshí 蓝宝石／藍寶石 Lánbǎoshí 钻石／鑽石 Zuànshí (Simplified/Traditional)[?]	Amethyst Emerald Ruby Sapphire Diamond
German	Amethyst Smaragd Rubin Saphir Diamant[?]	Amethyst Emerald Ruby Sapphire Diamond
Italian	Gemma[?]	Gem
Portuguese	Ametista Esmeralda Rubi Safira Diamante[?]	Amethyst Emerald Ruby Sapphire Diamond
Russian	Аметист Ametist Изумруд Izumrud Рубин Rubin Сапфир Sapfir Бриллиант Brilliant[?]	Amethyst Emerald Ruby Sapphire Brilliant
Spanish	Amatista Esmeralda Rubí Zafíro Diamante[?]	Amethyst Emerald Ruby Sapphire Diamond