Rocks Couture Gemstone Collection 18ct Yellow Gold Ring with 10 Oval Cut Sapphires & 11 Round Brilliant Cut Diamonds Emeralds are the birthstone of May and are thought to enhance intuition. Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium or sometimes vanadium. Emeralds are one of four gemstones globally recognised as ‘precious’ ,the others being diamonds, sapphires and rubies. Total Diamond Carat Weight: 0.88ct Emerald Dimensions: 5mm x 3mm