Black Onyx Obsidian- natural - 17mm L x 12mm W x 6.5mm T. Faceted, twisted oval 6 inch strand
Black Onyx 17mm L x 12mm W x 6.5mm T. Faceted, twisted oval 6 inch strand
Natural gemstone or semi precious stone comes from mineral. Due to the naturality, the stones may have tiny flaw. Meanwhile, cutting or polishing also makes every piece of gemstone vary in color and size.