We would like to thank the following reference resources, that helped make the information on this website possible.

Judy Hall, The Crystal Bible (Cincinnati, OH: Walking Stick Press, 2003).
Dorothee L. Mella, Stone Power II (Albuquerque, NM: Brotherhood of Life, Inc., 1986).
Robert Simmons & Naisha Ahsian, The Book of Stones (Berkley, CA: North Atlantic Books, 2007).
Walter Schumann, Gemstones of the World (New York, NY. Sterling Publishing Co., 1986). (SETT Company Ltd., 2005 -2013).  (Shimmerlings, Inc – Jeane Margherite, 2004 – 2011). (© 2013 That Crystal Site)
American Museum of Natural History (© 2001-2010 (© 2005-2013
Paleodirect (Copyright Paleo Direct, Inc.)
ReefQuest Center for Shark Research. (© 2003 R. Aidan Martin)
The Free Dictionary by Farlex. (Copyright © 2013 Farlex, Inc.)
American Meteor Society (© Copyright 2013-2013 American Meteor Society, Ltd.)