In the fascinating realm of natural color diamonds, a rare large blue diamond is going to mark its presence at Sotheby’s Hong Kong jewels and jadeite 2010 spring sale on April 7. Once part of the legendary De Beers Millennium collection, the 5.16 carat, pear-shaped internally flawless Fancy Vivid Blue gem is the first diamond of its kind to appear at an auction. The diamond’s internally flawless clarity and classic pear shape along with its brilliant sky-blue color is expected to fetch around $5.8 million. Via: Telegraph
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