Moissanite is a mineral discovered 50,000 years ago from the remains of a meteorite that fell from space. It has a beautiful, eye-catching shine, and is said to have a higher refractive index than natural diamonds, making it about 2.5 times as bright. Natural moissanite is extremely rare, but by successfully creating it artificially in the United States, you can now enjoy its brilliance. It also has excellent durability, making it perfect for everyday use. By arranging them from top to bottom without any gaps, you can fully enjoy the shine of melee moissanite and create a gorgeous impression. * TAKE-UP products are Made in Japan, handcrafted by Japanese craftsmen. Materials 10K Yellow Gold (Posts and Friction Backs are made of 18K Yellow Gold.), Moissanite Size Height 11.3mm, Width 1.7mm, Inner Diameter 8.0mm * The lengths above are approximate. Product ID: 3324154