Thank you for viewing. This is a turquoise necklace. Purchased about 8 years ago from a jewelry shop in Hawaii. Made with Sterling Silver Sterling silver is 92.5% pure silver. This purity is commonly used in jewelry. Pure silver (100%) is too soft for practical use, so copper is added. This creates a purity that combines the shine of silver with durability. Originally, Sterling Silver referred to the purity of silver coins established in England, and its name is said to be derived from the name of a technician named Esterlin, or from the old word "steorling" meaning "little star." Later, Sterling came to be used to mean "genuine" or "reliable." Sterling and 925 are the same meaning in terms of silver purity markings, but Sterling is often used in English-speaking countries, while 925 is often used elsewhere. ※The necklace chain is a separate stainless steel chain, sold separately. Please feel free to ask any questions in the comments.