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A diamond is a gemstone formed by cutting a raw diamond, which is a crystalline form of carbon with high hardness and dispersion. Learn about the history of diamond mining, cutting, and trade, as well as the characteristics and uses of diamonds as gems and industrial materials.
Before cutting, the stone was the largest brown diamond and the fourth largest diamond of any color ever discovered after the Cullinan (3,106.75 carats (621.350 g)), Excelsior Diamond (995 carats (199.0 g)) and Star of Sierra Leone (968.9 carats (193.78 g)). [12] The massive diamond's owners initially planned to cut it into the world's largest gem.
A 5.05-carat (1.010 g) Emerald-cut red diamond formerly known simply as "Red Diamond". This is the second-largest known red diamond. It was cut from a 35-carat (7.0 g) piece of boart discovered near Lichtenburg, South Africa. It reappeared in 2007 after a 37-year absence from sight, and was purchased by Kazanjian Brothers Inc. —
The largest recorded Yogo rough, found in 1910, weighed 19 carats (3.8 g) and was cut into an 8-carat (1.6 g) gem. [26] The largest cut Yogo is 10.2-carat (2.04 g). [ 11 ] [ 27 ] [ 28 ] Because of the rarity of large rough Yogo sapphires, Yogo gem prices begin rising sharply when they are over 0.5 carats (0.10 g), and skyrocket when they are ...
The Hope Diamond is a 45.52 carats (9.104 g; 0.3211 oz) diamond that has been famed for its great size since the 18th century. Extracted in the 17th century from the Kollur Mine in Guntur, India, [1] [2] the Hope Diamond is a blue diamond.
Learn about the characteristics, prices, and challenges of investing in diamonds as a commodity. Compare diamonds with other precious metals and synthetic alternatives, and explore the market trends and factors that affect their value.
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