Elloise Gaillou
Department of Mineral Sciences
Natural History Museum of Los Angeles County
Los Angeles, CA 90068
George R. Rossman
Division
of Geological and Planetary Sciences
California
Institute of Technology
Pasadena,
CA 91125, USA
Fancy-colored
diamonds have recently fetched record high prices at auctions. One can
wondier if those prices correspond to the rarity of such gems.