About the brand: Precious gemstones luxuriously crafted.. 14-karat yellow gold. Lab-Grown Faceted Emerald-cut Prong-set Diamond = approximately 4.00 ct. tw.; color = ; clarity = VS. Approximately 16in long. Lobster claw clasp closure. It is customary to treat most gemstones to achieve enhanced color and durability. Some of these treatments may not be permanent, and may require special care.