TAXCO Sterling Silver Earrings Semi Precious Gemstones. These heavy estate sterling silver earrings host three round cabochon gemstones set in a straight line between the hills and valleys. The semi precious gemstones include Orange Carnelian, Black Onyx and Green Chrysophase. The earrings are signed 925 and" TL-67 Mexico" and were made in TAXCO. These clip back earrings measure one inch by one inch. These sterling silver gemstones earrings are in very good condition.