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The majority of mined diamonds fall between white and pale yellow or brown; what is known as the normal color range. Diamonds of more intense color (usually yellow, but in some cases red, green or blue) are termed fancy color diamonds. Black diamonds are also fancy color diamonds. All other factors being equal, the most valuable diamonds are ...
In 1953, Liddicoat introduced the GIA diamond grading system - a practical approach to grading the quality of colorless to light yellow polished diamonds on the basis of color, clarity, and cut. A central feature was the D-to-Z color grading system for faceted colorless to light yellow diamonds—the vast majority of diamonds seen in the trade.
A 101.29-carat (20.258 g) antique cushion-shaped brilliant fancy vivid yellow diamond which is believed to have been found in the Premier mine in the South African Republic. It got the name Allnatt [5] after one of its owners, Major Alfred Ernest Allnatt. The diamond was sold for a little more than $3 million at Christie's auction in Geneva in ...
The Paragon diamond was acquired by Graff in 1989. The Paragon is a 7-sided diamond of 137.82 carats (27.564 g), cut, [13] [14] and was worn as part of "millennium" necklace of round, pink, blue and yellow diamonds by Naomi Campbell in 1999. [15] The Lesotho Promise was acquired as a rough 603-carat (120.6 g) stone for $12.4 million in 2006. [16]
Diamonds with unusual or intense coloration are sometimes labeled "fancy" in the diamond industry. Intense yellow coloration is considered one of the fancy colors, and is separate from the color grades of white diamonds. Gemologists have developed rating systems for fancy colored diamonds, but they are not in common use because of the relative ...
Diamond reports from GIA (as well as other, for-profit sources) are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 mg), and almost always for over 1.0 carat (200 mg), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer.