BOHO Jewelry Natural Black Obsidian Round Tai Chi Gossip Pendant Extend Bead Necklace The pendant necklace is made of Natural Black Obsidian.For crystal family, Obsidian Crystal is one of the strongest exclusion of negative energy. Obsidian is a gem, also known as "Apache tears. According to legend, the Obsidian for people like themselves, meaning no longer cry, happy. Mexico's stone is obsidian. Fine process:superb manual art-craft, strong and durable workmanship,highly hand polished ,wear comfortable Natural Black Obsidian,suit for both Mens and Womens,the old and the young,good for health. Bead rosary necklace with Adjustable Length. Intended use: Birthday ,Party, Anniversary, Business gift ,Christmas ,Easter ,Halloween ,Father's DayBlack Friday