LEGO Ideas and CUUSOO

Mineral Collection

Six brick-built crystals that catch the light on a shelf like the real thing.

Brick Rated Score

4.2/5

Set 21362 · 2025

Pieces880

Minifigsn/a

Year2025

Set number21362

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The verdict

This is one of those sets I didn't expect to fall for, and then I did.

Six brick-built minerals, three little display shelves, and a genuinely surprising amount of clever angle-work to get there. It won't tax you the way a big Technic build does, but the amethyst geode alone had me grinning at how it comes together. If you love the idea of a shelf that looks like a tiny natural history cabinet, this is a real treat.

Best for: Adults who want a colorful, low-stress display build with a natural-history charm

The full review

What it is

The Mineral Collection is exactly the kind of set that only exists because of the LEGO Ideas platform, and I mean that as a compliment. Instead of a spaceship or a castle, you get six brick-built minerals, pyrite, blue fluorite, tangerine quartz, watermelon tourmaline, a purple amethyst geode, and reddish-pink rhodochrosite, each on its own little freestanding shelf. The amethyst geode is the one that got me. It opens up into this cave of trans-purple slopes and looks so much like the real thing that I kept turning it toward the light. It came out of a submission by Italian fan designer Dario Del Frate, and you can feel the love for the subject in how carefully each mineral captures its real color and shape.

The catch

I will be straight with you about the caveats, because they matter depending on who you are. The build is not hard. It comes together in a relaxed half-hour to an hour depending on how often you stop to admire the shiny bits, and if you live for a puzzle that fights back, this is not that. There is also a small nit that a few builders raised: the minerals rest on their shelves rather than clicking firmly into place, so a bump can send one sliding. And like the botanical sets, this is decorative by nature, so if brick-built crystals sound more like clutter than joy to you, no review is going to change that. At 59.99 dollars for 880 pieces it is priced fairly, but it is a display object first and a building challenge second.

Who it's for

So who should bring this home? Anyone who wants a colorful, calming build that ends in something they will actually leave out on a desk or shelf. Rock and mineral lovers are the obvious fit, and it makes a lovely gift for a science-minded adult, but honestly anyone who appreciates a bit of natural beauty rendered in plastic will enjoy it. I would steer away only if your happy place is dense, technical engineering, because you will finish this wishing it had asked more of you. For everyone else, it is a small, cheerful, genuinely pretty set that punches above its size.

The parts story

What the build is actually like, and the pieces worth knowing about.

Building this is a lot more interesting than the finished pieces let on. You spend a surprising amount of time placing bricks at odd angles, working with SNOT technique, clip-and-bar anchoring, and hinge articulation to get those irregular crystal faces. The set ships in three instruction booklets, each covering two minerals plus a stand, so two or three people can build alongside each other, which is a genuinely nice touch for a family evening. It is unfussy but never boring, and the geode's stud-reversal sides are the kind of thing that makes you nod at the designer.

For parts people, there is real treasure here. The headline is a brand-new mold, the 1x1x1 2/3 brick with studs on three sides (part 7729), debuting in bright green and dark pink to build vertical faces with no gaps. Then come the recolors: trans-clear grille tiles making their first appearance, trans-light-blue corner slopes in only their second-ever color, and metallic drum-lacquered gold Minecraft cow-head cubes standing in for pyrite. With no stickers, the budget clearly went into those transparent elements, and it shows. Keep an eye out too for the printed paw-print cookies tucked in as a nod to designer Dario's cats.

Fun facts

01The set is based on a fan submission by Italian designer Dario Del Frate, and LEGO designer Jordan Scott swapped the original black tourmaline for the watermelon variant and emerald for fluorite to balance the color palette.
02The golden pyrite cubes are actually drum-lacquered Minecraft cow-head pieces in metallic gold, a clever bit of parts reuse.
03Hidden inside the fluorite are a random pink plate and a cheese slope, a wink at the designer's earlier rejected Sleeping Beauty Castle submission, plus printed paw-print cookies honoring his cats Mochi and Mia.