The Beau Sancy

Origin
The Beau Sancy is a 34.98-carat (6.996 g) modified "pear double rose cut" diamond found in India that has been owned by a number of European royal houses. This diamond was original found inside the stomach of a dead muessenger, who faithfully swallowed it to prevent it being stolen.

Effects
When this diamond is near someone who is being assaulted, be it mentally, emotionally, verbally or physically, it will teleport and reappear inside the victim's stomach. While it has no other effects, its mere presence can cause issues, such as internal bleeding due to its sharpness.

Collection
In May 2012, it was sold at Sotheby’s auction in Geneva for $9.57 million. The original estimated price of $2 million is lifted five times during the eight-minute battle between five buyers, before the diamond was sold to Agent Nielsen, who remained anonymous to the public.