Connoisseurship: Grading Special Cases – Grading Pearls

Posted on January 2, 2017 by Excerpt from the 2nd edition of Secrets of The Gem Trade, The Connoisseur’s Guide to Precious Gemstones by Richard W. Wise, GG (GIA)

Think of the beautiful glowing skin of a healthy baby or the dewy complexion of a beautiful young woman. These are excellent analogies because healthy skin has qualities similar to the skin of a pearl…

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