Gemologists rate the 110.3 carat diamond as fancy vivid yellow – the highest possible colour grading. The colour in yellow diamonds is caused by nitrogen impurities trapped within carbon molecules and hardened over the course of millions of years. The gem was discovered in South Africa in 2010 and wowed visitors to London’s Natural History Museum where it was displayed earlier this year, and also in Hong Kong.
But several major jewels were stranded on the block including an elaborate gold and diamond peace dove brooch, a blue diamond ring estimated at over $7.5 million, and a suite of imperial jewels.
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