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Natural Diamonds | Diamond Stone – GIA C
Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA.
Diamond History and Lore
The world’s love of diamonds had its start in India, where diamonds were gathered from the country’s rivers and streams. Some historians estimate that India was trading in diamonds as early as the fourth century BC.
Gemological Institute Of America | All About Gemstones - GIA
Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.
Diamond Description
Diamond’s characteristic chemical composition and crystal structure make it a unique member of the mineral kingdom. Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren’t part of the diamond’s essential chemistry.
Diamond Quality Factors
Diamond professionals use the grading system developed by GIA in the 1950s, which established the use of four important factors to describe and classify diamonds: Clarity, Color, Cut, and Carat Weight.
How to Buy A Diamond - GIA 4Cs
A diamond purchase should start with accurate information. A GIA diamond grading report ensures that you know exactly what you are buying.
What is a GIA Diamond? | Trusted Diamond Grading | GIA 4Cs
“GIA diamond” is a term you’ll find when engagement ring shopping – short for a diamond graded by GIA, the creator of the 4Cs and the independent, diamond authority. Learn more about ”GIA diamonds” and why savvy shoppers rely on GIA. In this blog, we’ll dive deeper into what makes “GIA diamonds” stand out, answer what makes a diamond a “GIA diamond”, and explain why ...
Diamond - Gemological Institute of America
Diamond Most diamonds formed more than a billion years ago! They form about 100 miles (161 kilometers) below the earth’s surface, where the temperature and pressure are just right. Diamonds are the hardest natural material on earth. They stand for fearlessness and invincibility, and are a symbol of love.
GIA Diamond Origin
Diamond mining is the largest private sector employer in Lesotho, employing thousands. The Lesotho mines, the most famous of which is the Letšeng mine – legendary for its massive, high-quality colorless diamonds – use technically advanced equipment for diamond extraction and trains local workers in computers and X-ray technology.
Black Diamond Buying Guide | GIA 4Cs
The diamond on the right was a heavily fractured milky white stone that turned black after high-temperature treatment, caused by graphitization along surface-reaching fractures. The black diamond on the left is natural. Natural Black Diamonds Research into what gives black diamonds their unique color is relatively recent.
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