This spring one of the world’s most perfect diamonds will go on sale at Christie’s and is expected to go for around $20 million. It’s the first time the diamond is being offered for sale which means the buyer will be able to name the “flawless” gem. The pear-shaped, colorless gem weighs 101.73 carats. The diamond was found in the Jwaneng mine in Botswana, which is co-owned by De Beers and the Botswana government. It originally weighed 236 carats and according to Christie’s it took 21 months to cut and polish. In November of 2012 the famous Archduke Joseph Diamond sold at Christie’s for $21.4 million. That stone was similarly colorless and 76.02 carats so this diamond could easily reach a $20 million price. The most expensive gem ever sold, the “Fancy Intense Pink, “was an emerald-cut 24.78 carat gem sold at Sotheby’s.