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Luigi’s Mansion 3 guide: B1 gem locations

Find every basement floor gem with our maps

Luigi’s Mansion 3 guide B1 gem locations guide Next Level Games/Nintendo via Polygon

Luigi’s Mansion 3’s B1 floor has six gems hidden throughout its rooms. In this guide, we’ll show you their map locations and how to find them all.

You won’t be able get all of these when you arrive in B1. Some of them require you to play for a few hours and get some upgrades.

On every floor, gems appear in the same order from left to right in the menu: clear, red, blue, green, purple, and finally yellow. We’ll follow the same order below.


Luigi’s Mansion 3 B1 Laundry room clear gem 2
Vacuum the cloth, and use your flash on the trunk
Next Level Games/Nintendo via Polygon

Vacuum the cloth off of the car, and use your flash bulb (hold R) on the green light to open the trunk and get the clear gem.


Use Gooigi to walk through the chain-link fence up the stairs at the far left of the garage.

Shoot the electrical box on the left wall with your plunger, and rip it off of the wall. Flash the green light with your … flash. That’ll open the door blocking access to the red gem.


  1. In the northeast corner of the garage, shoot your plunger at the metal cover that’s obscuring a grate. (That’s what you see us doing in the first image above.)
  2. Walk through the hole you’ve revealed into the elevator shaft.
  3. Walk to the right wall, down toward the camera, and climb the ladder to the top.
  4. Become Gooigi, and walk to the far left corner of the landing.
  5. Ooze through the floor and you can collect the B1 blue gem.


Luigi’s Mansion 3 B1 Laundry room green gem
Shot the dryer with your plunger, and pull the door open for the green gem
Next Level Games/Nintendo via Polygon

The first one is in the laundry room near where you pick up the Poltergust G-00 vacuum cleaner. Shoot your plunger at the dryer door, and pull. You may need to move the large laundry cart out of the way first.

And while you’re here, do the same on the other two dryers to get some more money.


Luigi’s Mansion 3 B1 Hallway purple gem
Shine your Dark-Light on the painting to get the purple gem
Next Level Games/Nintendo via Polygon

Shine your Dark-Light (LB + RB at the same time or hold X) on the purple painting next to the door that leads to the garage to get the B1 purple crystal.


Walk up the stairs, turn into Gooigi, and ooze through the grate in the floor at the top of the staircase. The B1 yellow gem is right there waiting for you.

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