The Silpada Sponge Coral Disc Necklace is a round-shaped pendant made of natural coral sponge with a channel-set style. The pendant is set in a sterling silver base metal with a large 22-inch chain. It is suitable for various occasions such as engagement, wedding, anniversary, and Valentine's Day. The necklace does not have any secondary stones, diamond clarity grade, or certification. It is a product of Silpada, a brand from the United States that specializes in natural mineral jewelry.