Pre-Auction Analysis: March 9, 2022, Sotheby’s New York, Important Jewels

We are happy to bring  you our Sotheby’s Pre-Auction Analysis. We hope it will help those who would like to participate in the auction without physically inspecting the goods.                                                 

Our Sotheby’s New York Pre-Auction Analysis focuses on elements that aren’t visible to the untrained eye. We will describe the important visual elements for those unable to attend the preview and discuss characteristics such as: Undertone, Color Dispersion, and Inner-Grade. These factors, collectively termed UDI, are explained in detail at the end of this article. We analyze and grade Fancy Color Diamonds relative to their GIA grade.

We use grades 1, 2, 3, and 4, with 1 being the lowest grade. A grade of “4+” is granted in rare cases and denotes stones with exceptional characteristics. Stones that receive a minimum total UDI score of 8, without a red remark, pass the industry threshold and can be traded easily. Fancy Color Diamonds that are graded 10 or above, (without a quality remark) are usually sought after by high-end jewelry brands, collectors, and the investment community.

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

• All images in this article review were taken with an iPhone 12 Pro; no filters were applied.
• All auction valuations are per-carat and listed in US Dollars

Lot: 221
Description: 1.02 ct, Fancy Vivid Blue, Cushion, VVS2
High Auction Estimation: $980,392 pc
Didn’t reach the minimum
Rarity: A similar diamond enters the market once every… Check Rarity Here
GIA Report: View

Analysis:
An old-mine Vivid Blue Cushion-shape diamond, with Fair symmetry. The low depth percentage makes the diamond appear larger