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Gem Certification and Assurance Lab (GCAL) is a diamond research and identification laboratory that offers a zero tolerance guarantee on all of its grading certificates.

The Gemological Institute of America, GIA, is the world

The Gemological Institute of America, GIA, introduces the new cut grading standard for round brilliant diamonds, the GIA Diamond Cut Grading System and a free online tool for predicting the cut grade of a diamond, the GIA Facetware Cut Estimator. Cu...

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Droste

Ideal Cut Diamond Brokers specializing in Hearts & Arrows quality round brilliant ideal cut diamonds and princess ideal cut diamonds graded by either the GIA or AGS gemological laboratories with optimum Diamond Cut Precision and Diamond Cut Perfo...

Includes diamond engagement rings gallery, diamond price tools, diamond search. Learn about diamonds through our forum, blog, and price charts.

Find My Rock is a diamond consumer dedicated website to educate the diamond consumer about the diamond industry. Includes diamond articles and education, insider price reports, price comparision, and diamond search from multiple diamond dealers.

wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual. Our multilingual how to manual has free step-by-step instructions on how to do all types of things.

Learn About Diamonds, Precious Gemstones, Jewelry, Colored Gem Grading & Basic Gemology