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The Wittelsbach-Graff Diamond is a 31.06-carat (6.212 g) deep-blue diamond with internally flawless clarity, originating in the Kollur Mine, India. Laurence Graff purchased the Wittelsbach Diamond in 2008 for £16.4 million. In 2010, Graff revealed he had had the diamond cut by three diamond cutters to remove flaws.
In 2005 Rosy Blue became a founding and certified member of the Responsible Jewellery Council. [14] [15] In 2008 Rosy Blue became a signatory to the United Nations Global Compact. [16] In 2017, Rosy Blue was named in both Panama Papers and Paradise Papers as an entity which transferred money to safe havens to avoid taxes in the country. [17]
Gemstone irradiation is a process in which a gemstone is exposed to artificial radiation in order to enhance its optical properties.High levels of ionizing radiation can change the atomic structure of the gemstone's crystal lattice, which in turn alters the optical properties within it. [1]
Famous Golconda diamonds include the colourless Koh-i-Noor, the Nassak Diamond, the blue Hope Diamond, the Idol's Eye, the pink Daria-i-Noor, the white Regent Diamond, the Dresden Green Diamond, and the colourless Orlov Diamond, as well as now-untraceable diamonds such as the yellow Florentine Diamond, the Akbar Shah, the Nizam Diamond, and the ...
The lineup has changed occasionally, beginning with the introduction of blue diamonds in 1975, followed by purple horseshoes in 1983, [12] red balloons in 1989, green trees in 1991, rainbows in 1992, blue moons in 1995, leprechaun hats in 1997 (temporarily replaced the green clovers), orange shooting stars and around-the-world charms in 1998 ...
While even a pale pink or blue hue may increase the value of a diamond, more intense coloration is usually considered more desirable and commands the highest prices. A variety of impurities and structural imperfections cause different colors in diamonds, including yellow, pink, blue, red, green, brown, and other hues.
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