A landslide has buried an old mountain mineral museum, and every light inside went dark. You are the new keeper. Pick up a geode, crack it open and see what sparkles inside - then find out where that crystal belongs. READ THE EXHIBITS, NOT THE HINTS There are no arrows and no labels. Every stand shows pale silhouettes of the crystals it is waiting for. Read shape and colour, and put each crystal in its place. Changed your mind? Take it back out. When a stand is full and every crystal is right, it lights up and paints the cave walls in its colours. FIVE HALLS, EACH WITH ITS OWN RULE - Amethyst Hall - an old mine full of rubble, lanterns and the first geodes. - Quartz Gallery - a marble gallery where every gem has its own cut and size. - Deep Vault - a dark vault by an underground lake. Look-alike minerals must be tested at the bench first. - Glow Grotto - salt and ice. Some crystals only reveal who they are under UV light. - Heart of the Mountain - the final grotto, where 22 legendary crystals return to their plinths. 22 minerals, 264 exhibits and 22 legends wait to shine again. A KEEPER'S TOOLS Earn lumens for every lit stand, every spare crystal and every bucket of rubble, and spend them at the Keeper's Workbench: - UV Torch - makes geodes that hide missing crystals glow. - Rock Rake - pulls geodes out of the rubble into a tidy pile. - Appraiser's Loupe - shows which stand the crystal in your hand belongs to. - Sieve Bucket - carries more rubble and sometimes finds crystal chips. - Heavy Hammer and Tumbler Motor - crack faster and earn more from spares. Spares are never wasted: polish them in the tumbler, or pin three on the collectors' board and receive a crystal you are still missing. COZY AT YOUR OWN PACE - No timers and no way to fail. Just you, the geodes and a slowly brightening cave. - Every hall has its own music, which gains new layers as more stands light up. - An Easy mode marks each crystal's place for a relaxed play. - The Keeper's Journal keeps track of every crystal you have found. Every crystal back in its place. Every hall shining again.