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DeGwyn Gems, Private Jewelers since 1975

Listed below are informational websites dealing with Diamonds, Colored Gemstones and other topics of interest to the jewelry buyer.

Colored Gemstones - Ruby, Sapphire, and Emerald

Informational and Educational Websites of Interest:

Gemological Institute of America

The world's largest non-profit educational and research institution, the original creator of the "Four C's" of Diamond Grading.

Gemological Institute of America

A Diamond is Forever, Inc.

An educational site sponsored by the Diamond Trading Company providing educational information about Diamonds and Diamond jewelry. Also offered is an interactive design tool for developing a ring design. Designs developed can be emailed to for manufacture.

Link to the Diamond Information Center

A comprehensive site for information about minerals and gemstones.

The Mineral and Gemstone Kingdom

An extensive reference site for Ruby and Sapphire gem information from the author's books and articles.

Identifying Sources among Burmese Rubies

A detailed and informative discussion of Burmese Rubies and their sources with excellent photographs of characteristic inclusions and colorations. American Museum of Natural History

NOVA Online: The Diamond Deception

From Public Broadcasting's NOVA Series, "The Diamond Deception" - Originally broadcast on February 1, 2000. A fascinating website offering educational information on Diamonds and other Gemstones.