GIA : Gemological Institute Of America. Established in 1931, GIA is the world’s largest and most respected nonprofit institute of gemological research and learning. GIA's mission is to ensure the public trust in gems and jewelry by upholding the highest standards of integrity, academics, science, and professionalism through education, research, laboratory services, and instrument development.

De Beers : De Beers LV is an independently managed and operated company established in 2001 by De Beers SA, the world's premier diamond mining and marketing company, and LVMH Moët Hennessy - Louis Vuitton, the world's leading luxury goods company.

The Argyle Diamond Mine : In 1979, in a remote corner of north-west Australia, the first inkling of the largest diamond mine in the world became known. The Argyle Diamond Mine. Geologists discovered that the diamonds from the Argyle mine had become colored when they formed 3 billion years ago. Enormous pressures from the earth's movement created diamonds beneath Australia's soil bright with fire and brilliance and color.

International Colored Gemstone Association: ICA is a non-profit association which was founded in 1983 to represent the international gemstone industry. The ICA is the first and only organization working to increase the understanding, appreciation, and sales of colored gemstones worldwide. There are more than 30 popular gem varieties and many more rare collector gemstones.

EGL Diamond Consumer Guide: European Gemological Laboratory's educational guide for diamond propotion analysis, diamond anatomy, shapes, cut clarity and color chart.

American Museum of Natural History, Diamonds : "The Nature of DIAMONDS" To learn A to Z about diamonds. What is diamonds? origin, history, mining & distribution, industry & technology, gems and jewelry, composition, structure, statistics etc. etc..

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