This is highly saturated vivid Apple-green Chrysoprase (variety of chalcedony) 925 sterling silver oval Shaped Cabochon Ring. Chrysoprase is considered the most valuable stone in the Calcedony group, the coloring agent is nickel. The color is fully natural.
Location: Australia
Size: 7
Weigh: 3.79 Grams

Interesting Fact!! Chrysoprase used to be referred to as "the stone of Venus," and was often used by the Greeks, Romans and Egyptians to make seals, signets, jewelry and other ornamental objects because of its beautiful green color. It is said to have been the favorite gemstone of Alexander the Great.