[272] - The Nature Company Guides: Rocks and Fossils, by Arthur B. Busbey III, Robert R. Coenraads, Paul Willis, and David Roots: Time Life Books, Australia, 1996.
Approval Status
Adopted by IAU
Approval Date
May 09, 2012
Origin
Gemstone notable for its color change, appearing green in daylight, but red under incandescent light; a variety of chrysoberyl.