Man first discovered diamonds 4,000 years ago in the riverbeds of the Golconda region of India.
Until the 18th century, diamond mines were only found in India.
Just as India's production was dwindling, diamonds were discovered in Brazil in 1725.
Diamond deposits were discovered in North America in the 1840s, and soon afterwards, the Great Diamond Rush was sparked by the discovery of diamonds in South Africa.
Diamonds were formed in the depths of the earth and are three-quarters of the Earth's age.
Most diamonds found in nature are one million to three million years old.
Diamonds are created deep within the earth, 75 miles or deeper.
The name "diamond" comes from the Greek word "adamas," which means "unconquerable."
Diamonds are made of pure carbon.
Diamonds are the hardest natural substance known to man. But because they have grain, they can be chipped if struck.
Only a diamond cuts another diamond.
Only one-fifth of all diamonds mined actually end up in jewelry.
80 percent of the world's diamonds are not suitable for jewelry.
A rough diamond will lose 40 to 70 percent of its weight in the cutting process.
To produce a single one-carat diamond, 250 tons of earth must be mined.
For every 1,000 polished diamonds, only one weighs more than one carat.
Possibly the most famous diamond in the world is the "Great Star of Africa," weighing in at 530.2 carats, cut from the world's largest rough diamond, the Cullinan, discovered in South Africa in 1905, weighing in at 3,106.75 carats.
Apart from the "Great Star of Africa," it produced the "Lesser Star of Africa" at 317.40 carats and 103 other diamonds of almost flawless clarity. The most important of these are mounted in the British crown jewels.
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