Pre-Auction Analysis: May 2017, Christie’s Hong-Kong
This pre-auction analysis will focus on visual elements that are not expressed on the GIA report, as well as other general observations that won’t appear in
Auction Analysis
Pre-Auction Analysis: May 2017, Sotheby’s and Christie’s Geneva
This Sotheby’s and Christie’s Geneva pre-auction analysis has a relatively large amount of blue fancy color diamonds.
Pre-Auction Analysis: April 2017, Sotheby’s Hong-Kong
This Sotheby’s Hong Kong pre-auction analysis focuses on visual elements that are not expressed on the GIA report, such as Undertone, Color Dispersion, and Inner-Grade (UDI). We use grades such as 1, 2, 3, and 4 to describe these features. The grade 4+ is used in special cases to describe unusual visual characteristics.
Pre-Auction Analysis: November 2016, Christie’s Hong Kong
This large Vivid Yellow Emerald cut was manufactured like a colorless diamond. Hence, we assume that it was not manufactured in the last two or three decades.
Pre-Auction Analysis: Christie’s and Sotheby’s Fancy Color Diamond Lots
According to our Rarity Evaluator, a stone with these gemological characteristics comes to the market once every few years and receives the “one of a kind” grade
Pre-Auction Analysis: 2016, Sotheby’s Hong Kong
According to our Rarity Evaluator this rare diamond receives a “One of-a-kind” grade. New pink (or purple pink) diamonds in the intense grade above 5 carat come into the market once every few years. Internally flawless pink diamonds represent 7% of all pink diamonds
Pre-Auction Analysis: Christie’s Hong Kong 2016
This 5.03 carat Fancy Vivid Green diamond is one of the largest Vivid Green diamonds seen at auction in recent years. Though the GIA generally employs softer grading criteria when determining a stone’s intensity level, this Vivid Green diamond exhibits a relatively high inner grade (grade 3).
Post-Auction Impressions: Sotheby’s Hong Kong
Noticeable discrepancies between live and in person auction house diamonds can create a bit of controversy. When a customer buys a high quality, fairly priced stone in retail and later sees what appears to be a comparable stone in an auction catalogue for a significantly lower price, it disappoints the owner.
Pre-Auction Analysis: May 17th 2016, Sotheby’s Geneva
This Vivid Pink has quite a low inner-grade (grade 2). The undertone is warm, leaning towards the orange spectrum (grade 2). The color dispersion is very high and earned a grade of 4. The GIA photograph in the Sotheby’s catalogue is the most accurate reference for this stone’s undertone (p 358-359).
Pre-Auction Analysis: May 18th 2016, Christie’s Geneva
It is very rare to see a diamond with a 1:54 ratio and low depth percentage of 59.9%, which should be considered a feature, as it makes the diamond appear larger than its actual size. The color is very dark and could easily be mistaken a Deep Blue.