Crafted from sterling silver this floral art deco style ring features a central round purple amethyst gemstone with marcasite stones making a floral pattern carnelian or cornelian as it is also known is a member of the chalcedony family of gemstones iron oxide impurities are responsible for cornelians deep rouge array of colouronce used as a substitute for the shine of a diamond the natural semi precious gemstone marcasite is now celebrated for its lustre and metallic beautycarnelian i