Opalite is Metallic Dice's best selling stone set! Opalite is a beautiful man made material that illuminates when subjected to light. We recommend rolling all stone dice on padded surfaces and storing them in the protective cases they come in for best long term preservation. Stone dice are rated for practical use on padded surfaces, but unfortunately they cannot be warrantied for play as they’re made from the genuine materials. Includes D4, D6, D8, D10, double-digit D10, D12, and D20.