Faceted Sapphire Mala (Grade A/B), 6mm with Black Onyx guru bead and adjustable tension knot ~ handmade in California exclusively for Tibetan Treasures. Gemstone faceting is a relatively recent innovation. Today most transparent gemstones are faceted ~ fashioned with a series of flat planes known as facets. A well-crafted geometrical arrangement will reflect light both internally and externally, maximizing the brilliance and fire of the stone.