A 37.30-caratpinkdiamondisexpectedtosellat auction for between $20-30millionin Geneva on November 15.
According to auction house Sotheby's, "The RajPink", is theworld'slargestknown Fancyintense pinkDiamond.
The roughdiamondwas mined in 2015 and is being auctioned by an anonymous owner.
Previous sales for smallerpinkdiamonds have yieldedmorethan$1millionper carat at auction.
A 24.78-carat FancyIntensePinkDiamondsold formorethan$46millionin November 2010 in Geneva.