Chrysoprase is a talisman of growth and development. It is a natural birthstone of those born between May 21 and Jun 20. It is is a primary meditation aid when resolving affairs of the heart. It is actually Chrysoprase, a variety of natural green microcrystalline quartz called "Chalcedony" that contains small quantities of nickel. Its color is normally a semi-opaque apple green, but can also vary to dark green.