These 4X4" square coasters are handmade out of resin and include copper shavings, metal shavings, crystals, and more. Each one varies. They are great to place other crystals on to charge them, or charge your water, spell/ritual tools, altar area, or use as a coaster for décor. So many great ways to use this coaster. Handmade by Manoah Nova-Third Eye Creations. One is chosen at random with purchase, so colors and styles all vary.