Metal Color: Gold: Handmade in Sterling Silver and Coated with a Thick Layer of 18K Yellow Gold to Gold Vermeil Thickness Silver: Handmade in Sterling Silver Gemstone: Please note: Due to the one-of-a-kind nature of the gemstone, exact colors and patterns may vary slightly from the image shown. Garnet Red: Garnet Color Lab-made CrystalParaiba Blue: Blue Natural ZirconBlack Onyx: Natural Black OnyxEmerald Green: Emerald Color Lab-Made CrystalMoss Agate: Natural Moss AgateOpal: Lab-Made Opal Gemstone Approximately 13.4mm (0.52in) High, 5.2mm(0.2in) Wide Click here to print the ring sizing chart without any scaling or image adjustments.