Metal: 14k White Gold with 14k Stamp Measurements: 6mm(W) x 15mm(L) Stone: 6x6mm Round Moissanite(IJK), 1.5x1.5mm Round Heat-Treated Blue Created Sapphire. Number of Stones: 2 Each Weight: 1.64 cttw. Setting: 4 Prong Earring Back: Fishhook Forever Classic by Charles & Colvard Charles & Colvard are based in the US and is the original creator of moissanite. Buy with confidence that you are getting the best on the market! Each purchase comes with a certificate of authenticity and limited warranty. ABOUT MOISSANITE: Moissanite tests as a diamond on the thermal diamond tester and is the most BRILLIANT gemstone. It has a hardness score of 9.25 on the MOH’s scale for hardness, and more durability than sapphire, ruby, or emerald. Diamond scores a 10 in comparison. Moissanite are NOT mined diamonds. Mined diamonds are often extracted from sensitive war zones in Africa, making the process environmentally damaging and socially unethical. Mining has carbon footprint, with land clearing and solid waste production as its major consequences