The pear-shaped Sun-Drop Diamond is graded fancy vivid yellow and has VVS1 clarity. The rough for the 110.03-carat gem was discovered in South Africa in 2010. The diamond is considered very rare for its weight and color.

An anonymous buyer paid $12.4 million for the gem at Sotheby's Magnificent Jewels Auction in Geneva.

The Blue Moon Diamond was sold for a record price of $48.5 million at Sotheby's in 2015. The precious stone weighs 12.03 carats.

Recently, an exclusive blue diamond known as The Oppenheimer Blue has been sold at Christie's Geneva setting a new auction record with a price of $50.6 million. The 14.62-carat gem was named by its former owner, late Sir Philip Oppenheimer. The Oppenheimers have been running their business in the diamond industry for 85 years.

A large cushion-shaped 16.08-carat pink diamond dubbed The Sweet Josephine was sold for $28.5 million at Christie's in Geneva to a Hong Kong bidder.

A large 84.37-carat diamond Chloe was named after the daughter of Georges Marciano, the co-founder of Guess Inc. He purchased the gem back in 2007 at Sotheby's. The Chloe was classified a Type IIa diamond, the highest category, because of the absence of nitrogen impurities that is characteristic of only about 1-2% of all naturally occurring diamonds.

Photo: The mentioned 15.38-carat pink diamond called The Unique Pink has recently been sold for $31.5 million at Sotheby's in Geneva. The Gemological Institute of America, or GIA, gave the pear-shaped gem the highest possible color grading for pink diamonds.