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It is the world's largest known red diamond, the rarest of all diamond colors. [1] The Moussaieff Red was discovered by a Brazilian garimpeiro named Ze Tatu in a manual digging [1] in the district of Major Porto in 1989, in a region known as Noroeste de Minas in the state of Minas Gerais. The rough stone weighed 13.9 carats (2.78 g). [1]
This is a partial list of the largest non-synthetic diamonds with a rough stone (uncut) weight of over 200 carats (40 grams). [1] The list is not intended to be complete—e.g., the Cullinan (formerly Premier) mine alone has produced 135 diamonds larger than 200 carats since mining commenced.
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. —
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Color grading of diamonds was performed as a step of sorting rough diamonds for sale by the London Diamond Syndicate. As the diamond trade developed, early diamond grades were introduced. Without any co-operative development, these early grading systems lacked standard nomenclature and consistency. Some early grading scales were; I, II, III; A, AA, AAA; A, B, C. Numerous terms
Argyle was the fourth-largest diamond-producing mine in the world by volume, averaging annual production of 8 million carats (1,600 kg). [9] Production peaked in 1994, when 42 million carats (8,400 kg) were produced. Argyle's open pit mine produced over 750 million carats (150,000 kg) of rough diamonds.
The production and distribution of diamonds is largely consolidated in the hands of a few key players, and concentrated in traditional diamond trading centers, the most important being Antwerp, where 80% of all rough diamonds, 50% of all cut diamonds and more than 50% of all rough, cut and industrial diamonds combined are handled. [93]
Manchester City will face Japanese side Urawa Red Diamonds in their first ever Club Word Cup match at 18:00 (GMT) on Tuesday. The Urawa Reds defeated Mexican side Leon 1-0 on Friday to set up the ...