Pre-Auction Analysis: October 20th, 2021, Sotheby’s New York, Important Jewels

As most of the industry has been prevented from traveling to New York during this challenging period, this Auction Analysis could help those who would like to bid without physically inspecting the goods.                                                 

Our Sotheby’s New York Pre-Auction Analysis focuses on elements that are hidden from the unprofessional eye. We will describe the important visual elements for those who cannot attend the preview and discuss characteristics such as: Undertone, Color Dispersion, and Inner-Grade (UDI; a detailed explanation appears at the bottom of this article). We analyze and grade Fancy Color Diamonds relative to their GIA grade.

We use grades 1, 2, 3, and 4, 1 being the lowest grade. Grade “+” is granted in rare cases and stands for stones with an exceptional characteristic. 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 for 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 in US Dollars.

Lot: 150

Description: 5.24 ct, Fancy Yellow, Cushion, SI1

High Auction Estimation: $8,587 pc

Price realized: $9,618 pc

Rarity: A small number of similar diamonds enter the market yearly… Check Rarity Here

GIA Report: View

Analysis: A Fancy Yellow Cushion cut with a rectangular outline resembling a Radiant cut. There are several colorless patches surrounding the crown. The Inner-Grade is low and there is