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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 info@degwyn.com for manufacture.

Link to the Diamond Information Center


Minerals.com

A comprehensive site for information about minerals and gemstones.

The Mineral and Gemstone Kingdom


Ruby-Sapphire.com

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.