Luigi’s Mansion 3 continues to charm players with its detailed exploration, creative puzzles, and hidden treasures. Among the game’s most satisfying collectibles are the multicolored gems scattered across each floor of the haunted Last Resort Hotel. Floor 3, known as the Hotel Shops, holds six of these elusive jewels, and while some later levels require upgraded abilities, all gems on this floor can be found using your base gear.
This guide provides step-by-step instructions for finding every gem on Floor 3, from the Mall Lobby to the secret rooms behind the storefronts.
How to Get All Floor 3 Gems
Gem 1: Near the Spade Key Shop
Begin by heading to the second floor of the Mall Lobby. Move toward the camera until you reach the railing. Here, use Luigi’s airburst (Slam) ability to open a nearby grate. Take the elevator and continue right until you enter the Lobby. Hop over the small balcony and you’ll discover a hidden crawl space leading to a chest containing the first gem.
Gem 2: Inside the Heart Key Shop
From the first floor of the Mall Lobby, go into the Heart Key Shop. Look for a mannequin bust positioned to the left of the entrance. Fire your plunger at it and pull using the Poltergust G-00. This reveals a concealed chamber next to the cash register where you can collect the second gem.
Gem 3: The Vending Machine Puzzle
Make your way to the area where the security guard ghost previously dropped the Diamond Key. You’ll notice a large vending machine in this location. Shine your flashlight on it to get a glimpse of what’s inside. Then, charge your flashlight and blast the machine—repeat this about six times until it finally drops the diamond gem.
Gem 4: Hidden Ladder Near the Diamond Key Store
Return to the second floor of the Mall Lobby and approach the Diamond Key Store. Before entering, use the Dark-Light Device on the wall to the left of the door. This reveals a hidden ladder. Climb up and continue toward the far right to find a cluster of bats guarding a pile of gems.
Gem 5: Restroom Passageway
Head toward the restrooms located before the Main Lobby gate. Begin in the men’s restroom and shine the Dark-Light Device in the left corner of the floor to reveal a hidden grate. Switch to Gooigi to slip through the grate, then turn off the nearby water valve. Switch back to Luigi and shine your light on the green button, unlocking a pipe that allows Gooigi to move through to the women’s restroom. Inside this secret path, you’ll uncover the fifth gem.
Gem 6: The Diamond Shop Encounter
Switch to Gooigi and enter the Diamond Shop using the Diamond Key. You’ll find that a ghost has taken the Heart Key. Defeat the ghostly intruders and reclaim the key. Then, pick up a nearby suitcase and hurl it at the glass display case to shatter it, revealing the sixth and final gem for this floor.
Luigi’s Mansion 3 is available now on the Nintendo eShop and at major retailers.
