About the material: Dice are made of synthesis black obsidian.
Dice are fragile, so we recommend that you can roll them on something with a soft surface, like a soft wool felt dice tray.
Features: * All our designs have two key points in mind, style, and number legibility so that they can look stunning without compromising functionality. * Each piece is cut and engraved by hand, so please allow for minor variations in shape and cut. Each dice is unique and may not be perfectly symmetrical. We encourage you to embrace the individual beauty of natural precious stones and the age-old methodologies of hand-crafting.