Black Agate Jewelry Making Stones

These are great jewelry making stones! Bundle and save on shipping!Black Agate is a type of microcrystalline quartz that is opaque and appears black or dark gray in color. However, the gemstone of Black Agate in the market is usually created by suffusing chalcedony in a sugar solution and then treating with sulfuric acid, causing the stone's appearance to change to a black color. Includes 8 full strings of stones and a small amount of loose stones. impeccable for everyday use. supreme materials and excellent craftsmanship ensure long-lasting durability.