This stunning sterling silver ring is available in eight semi-precious gemstones. You have a choice of Blue Topaz, Citrine, Amethyst, Turquoise, Carnelian, Rainbow Moonstone, Black Rutilated Quartz and Larimar *All natural semi-precious gemstones, Blue Topaz, Citrine, Amethyst, Turquoise, Carnelian, Rainbow Moonstone, Black Rutilated Quartz and Larimar. *Measurements Approximately: Stone Size for Larimar, Amethyst, Turquoise, Black Rutilated Quartz and Carnelian Ranges from 8-10mm-Round (Approx.) Stone Size for Blue Topaz, Citrine and Rainbow Moonstone is 8mm x 10mm Oval (Approximately) *Sterling Silver/.925 Silver This picture is an representation of the type and quality of the gemstone you will be receiving. As you know, there are slight variations due to the natural character of this product.