Picture style: Ghost mannequin Style: Modern, minimalist Appearance: Lock Material: 925 sterling silver, moissanite, rhodium-plated Craft: Polished Care: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide. Imported Product measurements: Chain length: 16 in Extension chain length: 2 in Moissanite: 0.3 carat Weight: 0.1 oz (2.6 g) Including: A matching box and bag. Every piece of jewelry containing a single moissanite over 0.3 carats comes with a certificate of authenticity and a limited warranty card with gemological research association (gra).