Featuring purple lab-created quartz stones, these sterling silver earrings are gorgeous. Earring Details: Length: 1-in. Backings: fishhook. Metal: sterling silver. Features: milgrain details & marcasite stones. Made with Swarovski Marcasite. Gemstone Details: Type: lab-created purple quartz. Cut: cushion & briolette. Color: purple. Setting: prong.