Earrings by John & Dawn Field These slightly domed, Zigzag ear studs are made from sterling silver and they feature two of our wonderful, lab. grown, 6mm blue opal triplets set in brass bezels. They measure 16mm in diameter and the ear posts and backs are made from sterling silver.We have eleven different gemstones to choose from, which are, Amber, Amethyst, Pink corundum, Garnet, Lapis lazuli, White moonstone, Blue spinel, Green spinel, Red and Blue lab. grown opal triplets, Turquoise. Please choose your favourite stone from the 'Finish' drop-down menu. Features Primary Material : sterling silver Other Materials : brass Length (mm) : 40 Fitting Type : Post Dimensions (mm) : 16 One of a Kind : No Metal : sterling silver Hallmarked : No Wire Material : sterling silver Cleaning InstructionsThese Zigzag ear studs have been finished with a clear, protective, aniti-tarnish coating.