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Main diamond producing countries. Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond as a form of carbon is a tasteless, odourless, strong, and brittle solid that is transparent in colour, a poor conductor of electricity, and insoluble in water.
Learn about diamond, the hardest and most valuable gemstone on earth. Explore its formation, properties, treatments, synthetics, imitations, 4Cs, and research from GIA, the world's foremost authority on diamonds.
Track and trace your diamonds and jewellery. My HRD Antwerp is a secure, 24/7 online service that provides global access to the HRD Antwerp grading report archive and transit results. MY HRD ANTWERP.
Learn how diamond color is evaluated based on the absence of hue and how it affects diamond quality and price. Find out the difference between colorless and fancy color diamonds and how to choose the best color for your diamond with GIA's color scale.
Diamonds are one of the best-known and most sought-after gems, and they have been used as decorative items since ancient times. The hardness of diamond and its high dispersion of light —giving the diamond its characteristic "fire"—make it useful for industrial applications and desirable as jewelry.
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Learn about the formation, occurrence, optics, inclusions, and value of diamonds, the most romanticized and heavily marketed of all gemstones. Find out where diamonds are mined, how they are graded, and what factors affect their price and quality.
