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''The Great Mogul Diamond'' described by Tavernier weighed 319.5 Ratti. The Mughal empire employed Ratti as a unit of measure for the weight of precious stones such as diamonds. Around 1665 the Shah's son, Aurangzeb, showed a diamond to the famous jeweler and world traveler Jean Baptiste Tavernier. At that time Tavernier wrote in his Six Voyages:
The quality of a diamond's cut is widely considered the most important of the four Cs in determining the beauty of a diamond; indeed, it is commonly acknowledged that a well-cut diamond can appear to be of greater carat weight, and have clarity and color appear to be of better grade than they actually are.
Diamond-weighing kit, with weights labelled in grams and carats. The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls.
The 360-degree circular symmetry of a Round diamond symbolizes balanced, harmonious relationships that will stand the test of time. ... How the shape carries its carat weight and interacts with ...
The weight of a diamond is one of these variables that determines a diamond’s worth and is what the general public is most familiar with. The unit of measurement, called the carat, equals 200 ...
The grain was the legal foundation of traditional English weight systems, [5] and is the only unit that is equal throughout the troy, avoirdupois, and apothecaries' systems of mass. [6]: C-6 The unit was based on the weight of a single grain of barley which was equal to about + 4 ⁄ 3 the weight of a single grain of wheat.
Pure (type IIa) diamond can be colored pink, red, or, brown owing to structural anomalies arising through plastic deformation during crystal growth; [20] these diamonds are rare (1.8% of gem diamonds), but constitute a large percentage of Australian diamonds. Type IIb diamonds, which account for ~0.1% of gem diamonds, are usually a steely blue ...
The Argyle diamond mine in Australia, the largest producer of diamonds by weight in the world, is located in a mobile belt, also known as an orogenic belt, [72] a weaker zone surrounding the central craton that has undergone compressional tectonics.