Mother of Pearl & Moissanite Heart Necklace. 14k Gold over .925 Sterling Silver Pendant and Chain Eye-catching pendant, surrounded by and accented with a Moissanite center stone. Expertly crafted with the Mother of Pearl filled heart fixed in the middle of the chain. Stones pass the diamond tester! New without tags. About Mother of Pearl: Mother of pearl is the name commonly used to refer to the nacre. The iridescent, pearly lining found on the inside of some mollusk shells, like oysters. It is known to symbolize purity, serenity, and emotional balance, About Moissanite: Originally discovered inside the center of a meteorite, moissanite is a brilliant and durable diamond alternative. Moissanite is a naturally occurring mineral called silicon carbide, which is very rare in nature. Moissanite used in fine jewelry is almost always created in a laboratory, where silicon carbide crystals are grown under controlled conditions. Moissanite is second hardest to diamonds on the Mohs hardness scale. Based on rankings from one to 10, diamonds are a 10 and moissanite is a 9.25-9.5. The gemstone is also known for its high refractive index of 2.65, making it the most brilliant gemstone on earth!