Pre-Auction Analysis: April 2nd 2019, Sotheby’s Hong Kong, Magnificent Jewels and Jadeite

By FCRF Team | 01.04.19
Pre-Auction Analysis: April 2nd 2019, Sotheby’s Hong Kong, Magnificent Jewels and Jadeite

This stone has two triangle colorless areas on each side. This geometrical appearance is typically seen in Emerald cut diamonds that were polished into a Radiant cut. This is usually done in order to achieve a stronger inner-grade or make inclusions less visible. Low clarity in blue diamonds is rarely seen.

Our Pre-Auction Analysis focuses on elements that are hidden from the unprofessional eye. As always, we will describe the important visual elements for those who cannot attend the preview. We will discuss characteristics such as Undertone, Color Dispersion, and Inner-Grade (UDI; a detailed explanation appears at the bottom of this article) the total UDI visual grade is mention under each chart.

We use grades 1, 2, 3, and 4, 1 being the lowest grade. Grade 4+ is granted in rare cases and stands for stones with an exceptional characteristic. Stones that receive a minimum total UDI score of 8, with a  ✔ , are mostly suitable for high-end jewelry, collectors and the investment community.

For your convenience, we have added direct links for the GIA reports.

  • All images in this article review were taken with an iPhone 10, no filters were applied.
  • All auction valuations are per carat and in US Dollars.

Sotheby’s, Hong Kong Magnificent Jewels and Jadeite, April 2nd, 2019

Lot #1798








3.32 carat Fancy Vivid Blue cut-cornered rectangular step-cut, IF

High catalog estimation: $2,302,409 per carat

Price Realized: Didn’t reach the minimum 

According to the FCRF rarity data, vivid blue Emerald cut diamonds in this specific size and ...

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