6mm geo gem necklace. Choose from amethyst, prehnite, opal, London blue topaz, ruby, turquoise, morganite or Swiss blue topaz set in sterling silver, oxidized silver, 14k yellow gold fill, 14k rose gold fill, 14k solid gold, or 18k solid gold.  Stones are all natural, so please allow for slight variations in color.  Actual stone shape may vary.