![A natural pearl and diamond pendant once owned by Marie Antoinette is held by a model during a press preview ahead of the upcoming auction \](http://www.ecns.cn/hd/2018/11/08/d1ec7a01a5ae45848321909882b5ecc0.jpg)
A natural pearl and diamond pendant once owned by Marie Antoinette is held by a model during a press preview ahead of the upcoming auction "Royal jewels from the Bourbon Parma Family" at Sotheby's in Geneva November 7, 2018. (Photo/Agencies)
![A model holds a natural pearl and diamond pendant once owned by Marie Antoinette together with wearing a pair of natural drops and a necklace featuring 119 natural pearls during a press preview ahead of the upcoming auction \](http://www.ecns.cn/hd/2018/11/08/674bbd6eda1e4456a26f1806128a43a4.jpg)
A model holds a natural pearl and diamond pendant once owned by Marie Antoinette together with wearing a pair of natural drops and a necklace featuring 119 natural pearls during a press preview ahead of the upcoming auction "Royal jewels from the Bourbon Parma Family" at Sotheby's in Geneva November 7, 2018. (Photo/Agencies)
![A model holds a diamond ring bearing the initials MA for Marie Antoinette and containing a lock of her hair during a press preview ahead of the upcoming auction \](http://www.ecns.cn/hd/2018/11/08/17e7e8c9e9044ba1947412f11afa9bf6.jpg)
A model holds a diamond ring bearing the initials MA for Marie Antoinette and containing a lock of her hair during a press preview ahead of the upcoming auction "Royal jewels from the Bourbon Parma Family" at Sotheby's in Geneva November 7, 2018. (Photo/Agencies)
![A model holds a diamond tiara part of the collection of Charles X the last king of France during a press preview ahead of the upcoming auction \](http://www.ecns.cn/hd/2018/11/08/d1943a38412843eebf40679604368805.jpg)
A model holds a diamond tiara part of the collection of Charles X the last king of France during a press preview ahead of the upcoming auction "Royal jewels from the Bourbon Parma Family" at Sotheby's in Geneva November 7, 2018. (Photo/Agencies)