Pre-Auction Analysis: April 17th-18th 2018, Christie’s & Sotheby’s New York, Magnificent Jewels

By FCRF Team | 15.04.18
Pre-Auction Analysis: April 17th-18th 2018, Christie’s & Sotheby’s New York, Magnificent Jewels

Christie’s & Sotheby’s New York pre-auction analysis

In this pre-auction analysis, we have a relatively large amount of blue fancy color diamonds. Most of them seem to be coming from the secondhand market as almost no new blue rough have been unearthed in the last few years. As always, we will focus on visual elements and other observations that are not expressed on the GIA report nor in the catalog.

Our analysis expresses characteristics such as Undertone, Color Dispersion, and Inner-Grade (UDI; a detailed explanation appears below). We use grades 1, 2, 3, and 4 (1 being the lowest grade). The grade 4+ is granted in rare cases and stands for an exceptional characteristic. Stones that receive a minimum total UDI score of 8, without a remark, are considered to be “gems” and are probably suitable for high-end jewelry, collectors, and the investment community. A detailed explanation on our grading system is at the bottom of this article.


For your convenience we have added direct links for the GIA reports and some FCRF Rarity reports.

All images in this article review were taken with an iPhone 7 – no filters were applied.

All auction valuations are per carat and in US Dollars.


Christie’s Auction – April 17th, 2018


Lot #71

40.57 carat fancy intense yellow cushion cut, VS2

High catalog estimation: $29,579 per carat

Price Realized: $23,971 per carat

A cushion cut diamond that was cut without giving too much attention to the color dispersion and was left with a large colorless frame. The yellow undertone has no green or brown influence. The “Intense” inner-grade is above average, and the VS2 clarity grade is a result of a black crystal underneath the table facet. ...

Enter your details to read this article for free
All fields are required.
People who read this article, also read:
FCRF Insights
My Fancy Color Diamond of the Decade
Ephraim Zion, Dehres “One of the most beautiful diamonds that I’ve seen during the last decade is a 1.10 ct cushion fancy vivid green, with the deepest and rarest color. The most obvious characteristic of this colored diamond is its saturation and brightness. To find diamonds in such a unique and vibrant green color is […]
Research & Studies
The Next Era of Fancy Color Diamond Supply
Secondhand market takes the lead over mining  Over the last decade, traditional mining has failed to satisfy the market demand for exceptional Fancy Color Diamonds. At the same time, following the natural succession of generations, the pre-owned market for rare Fancy Color Diamonds seems to be taking the lead. The low volume of exotic, unearthed […]
FCRF Insights
A blocked Stone Report
A GIA report with a mixed format was sent to the FCRF by one of our members. We were asked to clarify this interesting grid, as the GIA doesn’t attach an explanation for these rarely seen reports.
x close

To continue reading this article


Shopping Cart

You cart is empty

Apply for Membership

Become a part of our community and get unlimited access to all of our innovative Tools and Articles

The FCRF App is now available for
Download Button
Continue To Website