Framed with rhodium plated sterling silver, this stunning contemporary necklace features a hexagonal prism shaped black onyx gemstone. Black Onyx has been used in jewellery for centuries, most notably in ancient cameo jewellery. Black Onyx Information: Number of Stones: 1 Stone Shape: Hexagon Stone Size: 7.5mm x 7.5mm Carat Weight: 1.8ct Natural/Created: Natural Black Onyx Country of Origin: Brazil