Striped Agate is formed when molten rock cools within the crack and crevices of already present volcanic rock or silica deposits, forming visible parallel layers, or “stripes” as a result. Many varying ancient cultures believed that an agate stone could be used as a protective ward against tragedy, natural disasters, and evil energies. All gemstones can crack, chip and break like any real stone. We highly recommend using extreme care when rolling, storing and overall use to preserve the integrity of the stone and the numbers sand blasted onto the stone. These dice are absolutely gorgeous and we have lots of fun rolling them however like any piece of jewelry they do require care during use and storage. Due to the hand carving and by hand sand blasting nature of this product please allow for minor variances on shape, cut and number placement. The stones are naturally occurring stones and will not be balanced due to the natural makeup.