Look, we’ve all been there. You’re vacuuming up a stray pile of sand in the Tomb Suites or spinning a localized windmill in the Garden Suites, wondering why on earth Next Level Games decided to hide a tiny plastic diamond behind a fake wall. Finding Luigi's Mansion 3 all gems isn't just a completionist’s errand; it’s a test of patience that usually ends with you shining your Dark-Light at every single pixel of the Last Resort hotel.
It’s a lot. There are 102 gems in total. Six per floor. 17 floors if you count the basement levels. Honestly, some of them are clever. Others? They feel like the developers were just messing with us. But if you want that Suction Shot upgrade or just that sweet, sweet 100% save file, you’ve got to grab them all.
Why the Gem Hunt is Actually Harder Than the Bosses
Most people think the bosses are the peak of the challenge. They aren't. King Boo is a pushover compared to finding the clear gem on Floor 14. The real difficulty lies in the fact that Luigi’s Mansion 3 uses its environment as a puzzle box. You aren't just looking for chests. You’re looking for things that should be there but aren't, or things that are there but shouldn't be.
Take the Mezzanine, for example. You’d think a restaurant floor would be straightforward. Nope. You have to find a hidden room behind a coat rack. It’s that specific brand of Nintendo logic where you have to interact with the world in a way that feels slightly "wrong" to get the reward. If you see a row of four objects and one is missing, that’s your cue.
The Mechanics of the Search
Before you go hunting, you need to be a master of the Poltergust G-00. Most gems are locked behind one of three specific actions:
- The Suction Shot: If there’s a circle with a cross on it, slap a plunger on it.
- The Dark-Light: If a shadow looks weird or a trail of spirit balls appears, start painting with the rainbow light.
- Gooigi: If there’s a grate, a pipe, or a spike trap, send the green guy.
You’ll find that a huge chunk of the Luigi's Mansion 3 all gems locations require Gooigi to do the dirty work while Luigi stands safely to the side. It’s a co-op game even if you’re playing solo.
Floor by Floor: The Stuff Everyone Misses
I’m not going to list every single gem in a boring table. You can find a checklist anywhere. Instead, let's talk about the ones that actually trip people up because they’re devious.
The Basement and Grand Lobby
The B1 Garage gem is basically a tutorial. You pull the sheet off the car. Easy. But then you get to the Lobby (1F). Have you ever noticed the pressure plates near the elevator? Most players walk right over them. You need Luigi on one and Gooigi on the other to lower the chandelier. It’s a classic "Aha!" moment that sets the tone for the rest of the hotel.
Floor 4: The Great Stage
This floor is a nightmare because of the music theme. There’s a gem hidden in a tuba. A tuba! You have to blow air into it while the other character interacts with the valves. It requires a level of coordination that feels a bit clunky if you’re playing by yourself, but it’s immensely satisfying when that gem finally pops out.
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Floor 8: Paranormal Productions
This is arguably the best floor in the game, but the gems are tucked away in the "sets." There’s one where you have to take a torch from one room, carry it through the television warp points, and use it to burn a web in a completely different scene. It’s brilliant. It’s also the kind of thing that makes you want to throw the controller when you realize you walked past that torch ten times.
The Problem with the Ghost Research Lab
Professor E. Gadd is a genius, but his "hints" are useless. He’ll tell you there’s a ghostly presence, but he won't tell you that the gem is stuck in a vent you can only reach by positioning Gooigi at a very specific 45-degree angle.
The gems on Floor 15 (Master Suite) are particularly cruel. You’re at the end of the game. You’re tired. You just want to fight Hellen Gravely. But no, the game wants you to solve a rotating room puzzle that feels like it belongs in a Legend of Zelda dungeon. To get the final gems here, you have to manipulate the power grid and use the Poltergust to flip switches in a sequence that isn't clearly marked.
Nuance in the Physics Engine
One thing people overlook is the physics. Sometimes a gem isn't "hidden"—it's just stuck. In the Sandy Grand Hall (Floor 10), you might be looking for a gem that’s actually buried under a massive pile of sand. If you don't vacuum every single grain, you won't see the glimmer. The game rewards thoroughness, but it also punishes impatience. If you’re rushing, you’re missing.
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What Most People Get Wrong About Collecting
The biggest misconception is that you can get all Luigi's Mansion 3 all gems on your first pass through a floor. You can't. Not always. Some floors require abilities or specific interactions that you might not realize are possible until you've practiced more with Gooigi.
Also, don't waste your money on Gem Finds in E. Gadd’s shop early on. It’s a trap. Use your gold for gold bones instead. Gold bones keep you alive. You can find the gems yourself just by being observant. If you see a painting that looks slightly tilted, or a rug that has a lump under it, blow some air at it.
The Reward (Or Lack Thereof)
Let’s be honest for a second. The reward for getting all the gems is... a special Suction Shot attachment. It looks like a crystal. Is it game-changing? Not really. It doesn't make you hit harder. It doesn't make the ghosts easier to catch. It’s purely a flex. It’s about the journey and the satisfaction of seeing that 6/6 on every single floor in the menu.
Your Practical Checklist for the Hunt
If you’re serious about clearing this out, stop playing it like an action game. Play it like a detective.
- Check the Ceilings: Many gems are stuck in rafters or hanging from fans. If you see a ceiling fan, spin it. Always.
- Listen for the Glimmer: There is a specific high-pitched tinkling sound when a gem is nearby. It’s subtle. Turn your music down a notch if you have to.
- The Burst Move: Don't forget the Jump/Burst (pressing L and R together). It shakes the floor and can dislodge gems hidden in nearby furniture.
- Mirror Images: If a room has a mirror, look at the reflection. Frequently, a chest or a gem will appear in the mirror but be invisible in the "real" room. Use the Dark-Light on the empty space to make it materialize.
Final Insights on Completion
Getting every gem in the Last Resort is a grind, but it's one of the most rewarding grinds in modern Nintendo games. It forces you to appreciate the level design. You start to notice the tiny details, like how the wallpaper changes or how the lighting hits the dust motes.
If you're stuck on a specific floor, leave and come back later. Sometimes a fresh set of eyes is all you need to see the "invisible" pipe Gooigi needs to crawl through. And remember, the game isn't trying to be unfair; it’s just trying to be a puzzle.
Go back to B2 (the Boilerworks). That’s usually where people miss the most stuff because of the water levels. Check the pipes again. Use Gooigi to check the areas that look like they’d kill Luigi. Usually, that’s exactly where the treasure is. Once you have that final gem, head back to E. Gadd’s lab and claim your bragging rights. You’ve earned them.