Switch to Gooigi at the top of the stairs, fall through the grate, and grab the Gem. This guide will cover floors B1, 1F, 2F, 3F, 4F, and 5F, while also including handy maps pinpointing where every gem is located! The hidden gems in Luigi's Mansion 3 can be difficult, so we'll help you! Luigi may be trying to capture ghosts, but that doesn't mean he can't hunt for treasure. Luigi's Mansion 3 gems are hidden all over its 15 floors and two basement levels. These gems are so elusive and require players to collect all gems to complete the whole story. Luigi’s Mansion 3’s B2 Boilerworks has six hidden gems shaped like wrenches. Luigi's Mansion 3 gems are hidden all over its 15 floors and two basement levels. For more on the game, you can read our scored review right here and our expansive Guide Wiki . Gem, Gems! Check out this massive guide to learn where all of the hidden gems are located in Luigi's Mansion 3 and what you get when you find all 102 of them. In this guide, we’ll show you their map locations and how to find them all. These gems are so elusive and require players to collect all gems to complete the whole story. What you can't see, thanks to the camera angle, is the metal grate right above it. In this guide, we’ll show you their map locations and how to find them all throughout the level. These are one of the hidden materials that you need to discover in Luigi’s Mansion 3 game. Check out our Luigi's Mansion 3 Level 3 gems tutorial to see all floor 3F jewel locations to complete the floor 100%. With so much to do, a Luigi's Mansion 3 guide will help with all the essentials: from catching Golden Ghosts, to finding Gems, Boos and more. There are a total of 102 gems scattered across the 17th floor of the Luigi’s Mansion. Luigi’s Mansion 3 Gems Locations. For Luigi's Mansion 3 on the Nintendo Switch, a GameFAQs message board topic titled "What do Gems do? And that’s our list on all of the hidden gem locations in Luigi’s Mansion 3. White Gem Luigi’s Mansion 3 Gems Locations. In this guide, we’ll show you their map locations and how to find them all throughout the level. Head up the stairs leading to the Lobby, and you'll see the Gold Gem. Luigi’s Mansion 3’s 1F : Grand Lobby level has six diamond-shaped hidden gems. Luigi’s Mansion 3’s 15F Master Suite has six hidden gems shaped like a King Boo.