A stunning Art Deco style necklace crafted from sterling silver featuring a black onyx cabochon, offset with sparkling marcasite gemstones with a smaller black onyx above Black Onyx Information: Number of Stones: 2 Stone Shape: Round Stone Size: 14mm | 3mm Carat Weight: 3.1ct marcasite Information: Number of Stones: 8 Stone Shape: Round Stone Size: 1.1mm Carat Weight: 0.088ct