A beautiful geological game in a handy size with beautiful art by Uta Krogmann. Color insert for reference and Gemstone identification included. •Sharpens visual acuity, concentration, and memory skills •For 1-4 Players •Age 3+ •Playtime:15-25 minutes •Set includes 18 pairs of 2” x 2” illustrated tiles to match •Box Size: 4” x 6”x 1.25” •Created in collaboration with educators, psychologists, parents, artists, and other experts •Sustainably Sourced: Made with recycled board and printed on FSC®-certified paper using vegetable-based inks •Winner of the Oppenheim Gold Toy Award Great for: Easter baskets, spring break travel, birthday swag bags, goodie & loot bags, and stocking stuffers