Etymology and history The word chrysoprase comes from the Greek χρυσός chrysos meaning 'gold' and πράσον prason, meaning 'leek'. It is said to be a "Victory Stone." In the 18th century, as said, thieves used to become invisible by keeping the stone in their mouth. Chrysoprase is cryptocrystalline, which means that it is composed of crystals so fine that they cannot be seen as distinct particles under normal magnification. Chrysoprase description Chrysoprase, chrysophrase or chysoprasus is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The... more about chrysoprase » | more about stones used in our jewelry »