|While extraordinarily rare, blue diamonds are not the rarest. |
They are more uncommon than yellow diamonds, which have nitrogen in them, but they lose out in rarity to green, black, pink, orange, purple, and red.
|The Wittelsbach-Graff is a 31.06-carat, Fancy Deep Grayish Blue diamond with an IF clarity and an unusual cut with 82 facets. The stone sold in 2008 for $24.3 million.|
|A recent find by Petra Diamonds. The 29.6-carat stone was recovered at its Cullinan mine, about 40km (25 miles) north-east of Pretoria.|
Petra unearthed another 25.5 carat blue diamond which sold for $16.9m in 2013.
|In the past decade, only three blue diamonds of 10 carats or more with the same vivid grading for intensity have been sold at auction, all weighing less than 12 carats and none flawless.|
|The Premier Blue is a 7.59-Carat Internally Flawless Fancy Vivid Blue Diamond.|
Expected to bring upwards of $ 19m the stone did not find a buyer in late 2013.
|A 6.01 carat Fancy Vivid Blue Diamond that sold for $10.1 million, or $1,686,505 per carat, at Sotheby’s Hong Kong in October 2011.|
A 5.3 carat blue diamond fetched $9.6 million, or $1.8 million per carat in April 2013.
| US$1.59 million per carat was achieved by a 8.01-carat, emerald-cut, fancy vivid blue diamond in 2012.|
The Blue Heart diamond