On November 15, Christie's sells a pear-shaped fancy vivid pink weighing 9.14 carats. Its clarity is only VS2 but it is exceptional by the purity of its shade without any trace of secondary color. It is estimated CHF 16M, lot 216.
The fancy vivid pink is the most subtle variant. Let us quote the Pink Star, internally flawless weighing 59.60 carats, sold for CHF 76M including premium by Sotheby's on November 13, 2013 but unpaid by the buyer.
Another example more comparable in size and clarity to the gem coming for sale is the former diamond of Huguette Clark, reduced to 8.72 carats to achieve a VS2 clarity. It was sold for CHF 14.8M including premium by Sotheby's on May 12, 2015.
On November 16, Sotheby's sells a fancy intense pink weighing 17.07 carats, lot 336 estimated CHF 12M. Its clarity is sensational. It was graded VVS1 by the GIA including the suggestion for a polishing that would probably upgrade it to internally flawless. Its beauty is demonstrated in the video below.
The diamond for sale is emerald-cut, often considered as the best cut with regard to brilliance. The Graff Pink, another emerald cut fancy intense pink weighing 24.78 carats in clarity VVS2, was sold for CHF 45.4M including premium by Sotheby's on November 16, 2010.
Clarity is not enough to predict the price per carat. The saturation of the color provides in theory an advantage to the fancy vivid pink variant. Let us remind the scale of clarity : IF, VVS1, VVS2, VS1, VS2, SI1, SI2.
RESULTS INCLUDING PREMIUM :
Christie's : SOLD for CHF 18M.
Sotheby's : SOLD for CHF 21M.