A rare blue diamond, which at different times belonged to different royal houses of Europe, was sold at Sotheby's auction in Geneva for $ 6.7 million. The blue diamond of Farnese was donated to the wedding of Isabella Farnese, the daughter of Crown Prince Parma. In 1715, she married the King of Spain, Philip V. The jewel was then handed down for 300 years by inheritance and became the property of the royal houses of France, Italy and Austria. A 6.1-carat diamond was mined at the famous Golconda diamond mines in India. The buyer of the diamond was determined quite quickly - it took only four minutes of trading. The auction house hoped to gain for it 3.5-5 million dollars, but the final price was higher. "We did not doubt the good result, but the initial cost was $ 3.

5 million, and as a result, the stone was sold for $ 6.7 million. So the result exceeded expectations, - said jewelry specialist Sotheby's Daniela Maskelti. "Good stones, beautifully conceived, beautifully executed, with characteristic features, made at a certain time, are sold well". According to the auction house, a blue diamond adorned the diadem of Queen of France Marie Antoinette. The buyer of the precious stone preferred to remain anonymous. Source: BBC News.