Farnese Blue diamond set to sell for £3.7million

A diamond unearthed in India 300 years ago that has passed through the hands of four European dynasties, even appearing on a tiara owned by Marie Antoinette, could fetch more than £5million at auction when it goes on sale for the first time.

The 6.16-carat Farnese Blue diamond was discovered in the Golconda mine, where the Hope Diamond was also found.

The first historical record of the stone came in 1715, when it was gifted to the Italian-born queen of Spain Elisabeth Farnese following her marriage to King Philip V of Spain.

The 6.16-carat Farnese Blue diamond is set to fetch millions of pounds when it goes on sale at auction this month. The stone has been passed around European royalty since it was found 300 years ago

The 6.16-carat Farnese Blue diamond is set to fetch millions of pounds when it goes on sale at auction this month. The stone has been passed around European royalty since it was found 300 years ago

Experts predict the stone could smash its estimated guide price when it goes under the hammer 

Experts predict the stone could smash its estimated guide price when it goes under the hammer 

The pear-shaped, dark grey-blue diamond was then passed down through seven generations of European royalty, going from Space, to France, and Austria. 

Despite the Farnese Blue Diamond being the property of royals and at different points being on the tie pin Duke of Lucca Charles II and even on a tiara belonging to Marie Antoinette, for much of its history the jewel's existence remained unknown to all but family members and the jewelers who dealt with it.

This month Queen Elizabeth's descendants will auction off the diamond at Sotheby's Magnificent Jewels and Noble Jewels auction in Geneva. It

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