Diamond is a mineral form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond is a tasteless, odorless, strong, brittle solid, a poor conductor of electricity, …

Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.

Mar 25, 2026 · A diamond is a mineral composed of pure carbon. It is the hardest naturally occurring substance known; it is also the most popular gemstone. Because of their extreme hardness, …

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Comprehensive natural All diamond price guide. Compare prices across all carat sizes and quality grades. Find the best deals updated daily.

Dec 22, 2025 · Diamonds are one of the most precious and valuable gemstones in the world, known for their exceptional hardness, brilliance, and durability. They are formed deep within the earth over …

Diamond, the hardest substance found in nature, was known to the ancient Greeks. They called the gemstone adamas, using the same word they used for any unbreakable or indestructible substance, …

Diamond[a] is a gemstone formed by cutting a raw diamond. Diamonds have high monetary value as one of the best-known and most sought-after gems, and they have been used as decorative items …

Diamond forms under high temperature and pressure conditions that exist only within a specific depth range (about 100 miles) beneath the earth’s surface. Diamond’s crystal structure is isometric, which …

Diamonds have a long history as beautiful objects of desire. In the first century AD, the Roman naturalist Pliny stated: “Diamond is the most valuable, not only of precious stones, but of all things in this …