Blue diamonds

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This gemstone could easily be mistaken for a blue sapphire but in fact it is one of the most intensely coloured blue diamonds ever found. Small in stature at .51cts but big on colour it was originally featured in Harvey Harris' Fancy Color Diamonds (released in 1994) photography by Tino Hammid.

Blue diamond's can appear as a Faint Blue, Very Light Blue, Light Blue, Fancy Light Blue, Fancy Blue, Fancy Deep Blue, and Fancy Vivid Blue. In the event of a secondary hue, a Fancy Dark intensity is also possible.

Diamonds and rubies and sapphires, oh my! From the Regent Diamond to the Black Orlov, all of these 13 precious stones are famous for their beauty and worth, but some are infamous for the misfortune they're believed to attract to their owners.

On display in the Harry Winston salon, located in Harrods' Watch and Fine Jewellery rooms, the Winston Blue diamond makes a rare appearance until 28 November.

Fetching sky-high prices at auction this year proves that diamonds are still the most coveted gems in the world.

A Rising Star - The Zoe Diamond - 9.75 carat blue diamond sold for over $32 Million and became the most expensive blue diamond and most expensive per carat