Luigi’s Mansion: Dark Moon Gems Locations Guide

  • By Staff

  • March 28, 2013

  • 1

Rhombus Ruby (C-3 Roundhouse Brawl)
Location. It is in the Clockmaker’s Chambers. Spin the rotor under the ground to set the clock at “9:00.” Then grab the greenie when it pops up from the bed.

Star Ruby (C-3 Roundhouse Brawl)
Location. In the roundhouse on the F2 level. It is inside the box.

Octagon Ruby (C-3 Roundhouse Brawl)
Location. It is inside the roundhouse. It is in the northern edge of the roundhouse. You will need to follow steps from the bottom to locate the gem.

Oval Ruby (C-5 Piece at Last)
Location. In the gear chamber. You will need to complete the bonus challenge hidden behind the north wall of the chamber.

Spindle Ruby (C-5 Piece at Last)
Location. In the Maintenance Hub. You will need to drop down from the huge gear. In the room’s south side there is a hidden box. Use dark light on it to reveal it. Gem is in the box.

Coffin Ruby (C-5 Piece at Last)
Location. In the service elevator’s F1 level. You will need to launch the Toad Assistant to the southeast corner of it.

Mushroom Ruby (Showtime)
Location. This gem is placed in the base of the Movements. You will see it on the outside of the window. Use Vacuum to draw it close.

Secret Mine

Round Sapphire (D-1 Cold Case)
Location. It is in the northeast corner of the smoke house. You will need the dark light to reveal the hidden scarf. You must A-Pull the scarves on the wall. A panel will open up. You can vacuum the gem from there.

Trillion Sapphire (D-1 Cold Case)
Location. It is in the Fishing Hut. You will need to use the Poltergust to vacuum the gem from under the floorboards.

Baguette Sapphire (D-1 Cold Case)
Location. It is in the area called ‘under the ice.’ You will need to launch the toad from the north wall to the shaft. The gem will appear in the center of the area.

Football Sapphire (D-1 Cold Case)
Location. It is in the nest hallway from across the high wires.

Drop Sapphire (D-1 Cold Case)
Location. You will need to return to the airway and retrieve the gem from the barrel, only after you see the gem being carried away by a bat to the elevator via the airway binoculars.

Pebble Sapphire (D-2 Hit Rock Bottom)
Location. This gem is located on the chalet approach. You will need to burn the turkey on the grill and then use it to melt the ice off the framed painting. Use the dark light on the painting to get the game.

Rhombus Sapphire (D-2 Hit Rock Bottom)
Location. Placed in the centre of the prospector’s crossing. Use the dark light to reveal the hidden pickaxe in the southwest corner of the room. After that, spin the pickaxe to find the two logs. Shift the logs on to the ice in the center to release the gem.

Star Sapphire (D-2 Hit Rock Bottom)
Location. This gem is in the skip slope. It is near the west wall of the are beyond the large wheel. You will need to time your jump to get through the wheel.

Octagon Sapphire (D-2 Hit Rock Bottom
Location. You will need to A-Pull the chain at the bottom of the shaft. This will open the chute from where you can collect the gem.

Oval Sapphire (D-2 Hit Rock Bottom)
Location. It is on the ceiling of the deep hall. To locate you will need to stand between the conveyer belt and the fire and look up. You will see the gem stuck in ice. You will need to launch the burning ember to release it from the ice.

Spindle Sapphire (D-3 Across the Chasm)
Location. This gem is in the crossroads. Use the dark light to locate the hidden overturned cart on the western ledge. Vacuum the snow from the cart to collect the gem.

Coffin Sapphire (D-3 Across the Chasm)
Location. For this you must pass through the Crystal Quarry E-Gate. After this, when you return to the chalet, the gem will spring up from the couch.

Mushroom Sapphire (D-3 Across the Chasm)
Location. To collect this gem you must win the snowball fight in against three Hiders in the high wires outhouse.

Treacherous Mansion

Round Diamond (E-1 Front-Door Key)
Location. This gem is in the underground lab. You need to vacuum a couple of things. First, the wheel then the helmet of suit of armor and blast it into the glass jar on the east wall. After that, vacuum the gem from the shelf.

Trillion Diamond (E-1 Front-Door Key)
Location. It is in the haunted catacombs. Just follow the paths set by the suits of armor to the big webbing and after that a framed painting. Use dark light on it and then light it on fire. After that clear the webs from the wall.

Baguette Diamond (E-1 Front-Door Key)
Location. This one is at the Cliffside on the B2 level. You need to vacuum the gem from the vine.

Football Diamond (E-2 Double Trouble)
Location. This one is under the front entrance stairs. You need to use dark light on the nearby gargoyles and then pull the revealed chain to open the secret compartment.

Drop Diamond (E-2 Double Trouble)
Location. This one is in the restrooms. You will need A-Pull the chain in the western half of the restrooms, then collect the gem once it pops.

Pebble Diamond (E-2 Double Trouble)
Location. This gem is on the gargoyle’s roof. You will need to collect all the stars located in this area. After that, the gem will appear in the center of the area.

Rhombus Diamond (E-2 Double Trouble)
Location. This gem is in the ancient exhibit. Grab the bucket from the dark age exhibit and fill it with water from the jungle exhibit. After that, water the sprout in the southwest corner of the ancient exhibit. A flower will grow flash it to collect the gem.

Star Diamond (E-3 A Train to Catch)
Location. In the aviation exhibit, under the grate. You will need to A-Pull the sandbags attached to the balloon. After that balloon will fly away revealing the gem.

Octagon Diamond (E-3 A Train to Catch)
Location. This gem is in the nautical exhibit. You need to place a filled water bucket on the pressured plate in the nautical exhibit. Go through to the door towards the pirate ship. At the end of the ship you will find the gem.

Oval Diamond (E-3 A Train to Catch)
Location. This one is in the dark age exhibit. You will need to get the blue book from the study using the bulb. You will need to place the blue book in the bookcase along the north wall in the dark age exhibit to find the game.

Spindle Diamond (E-3 A Train to Catch)
Location. You need to get a bulb into the Jungle Exhibit, then float up to level F2. Clear the crows from the area, vacuum the gold bulb and collect the coins that appear. Collect all of the coins before they vanish to reveal a chest. Then open the chest to find the Spindle Diamond.

Coffin Diamond (E-3 A Train to Catch)
Location. N/A

Mushroom Diamond (E-3 A Train to Catch)
Location. This gem is in the train exhibit. You will have to use the dark light to reveal a hidden part of the track. After that wait for the train to appear and ride it once around the room to automatically collect this gem.

If you find something missing, let us know and we will add it up. If there is something confusing, comment and we will try to help you out!

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By Staff

Contributor at SegmentNext. I am called into service for posting cheats and community contributed content.


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    • SuperZeldaYoshi

      The Coffin Diamond in Treacherous Mansion is located on the second floor of the Ice Age Exhibit. All you have to do is get a balloon flower from the Study, go through the portals to the Ice Age Exhibit, and use it to float up to the upper left corner of the room. There you find a gold balloon, and if you get all the coins in time, a chest will appear with the Coffin Diamond. Other than that, nice guide. It helped me find all of the gems I got stumped on.