Chrysoprase - is the gemstone variety of Chalcedony that contains small amounts of nickel. Its color is normally apple green but can vary from lighter to darker green. Translucent stones in larger sizes are rare. Marlborough Green from Australia is a dead ringer for high end jadeite, Imperial to apple green and can be expensive with good clarity, translucency and color. Size and cut of cabochons also make price go higher. Often faked, mislabeled or treated in Asia.