Pre-Auction Analysis: Sotheby’s Geneva Magnificent Jewels, November 15th 2018
Our Pre-Auction Analysis focuses on elements that are hidden from the non-professional 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).
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 mostly suitable for high-end jewelry, 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 10. No filters were applied.
- All auction valuations are per carat and in US Dollars.
Sotheby’s, Geneva Magnificent Jewels, November 15th 2018
2.61 carat fancy vivid blue pear shape, VS2
3.06 carat fancy vivid blue pear shape, VS2
High catalog estimation: $1,773,860 per carat
Unsold – Didn’t reach the minimum
Two vivid blue pear shapes with 73% and 82% depth, respectively. Each has an ...