... -precious gemstone stampOther Material: Amber, amethyst, aquamarine, aventurine, bloodstone, blue topaz, carnelian, citrine, crystal, emerald, garnet, green amethyst, iolite, jasper, labradorite, lapis ... well-established manufacturer and exporter of semi precious stone & gemstone products (including beads, loose gem and carving products), OEMs and ODMs are ...