Iridescent lab-grown sun opal pendant necklace on square chain necklace . Gorgeous opal colour flashes can be seen from different angles. Opal diameter: 8mm Chain length: 16-18inch adjustable Chain options include - GOLD: 14ct Gold Filled (up to 10,000 times thicker than regular gold plating) SILVER: 925 Sterling Silver All orders come packaged in a beautiful ORA gift box.