A crucial change to GIA grading reports could restore confidence among the trade and consumers.
Category: Auction
9.51-carat stone fetched around 20% more in 2014.
The Vanderbilt sapphire more than doubles its high estimate at $3.6 million.
Kindred Lubeck, founder of jewelry brand Artifex, makes auction debut.
26.95-carat gemstone will carry $39,900 estimate at the November 13 Geneva sale.
17.66-carat stone will feature at Magnificent Jewels auction in New York.
Ring to lead November 14 Geneva sale, with an upper estimate of $247,868.
Ring containing the 7.19-carat stone will carry $309,900 estimate at November 18 auction.
Other leading pieces in Geneva auction include Mellon Blue diamond and JAR ring with pear-shaped pink.
Milan auction rakes in $7 million.
Top lots on offer include $20 million pink diamond, $7.3 million blue and $4.8 million yellow.