Colorless to Near-Colorless Diamonds, Emeralds from Pakistan, a History of European Royal Jewel Sales, and More…
Unknown Dendritic Inclusions in Sapphire
Dendritic inclusions in a pinkish-purple sapphire are revealed with fiber-optic lighting.
Quarterly Crystal: Ferrocolumbite in Topaz
“Star cruisers” formed of ferrocolumbite seem to fly in a large topaz crystal from the Shigar Valley in Pakistan.
A History of European Royal Jewel Sales, Including Sotheby’s 2018 Auction of Marie Antoinette’s Jewels
Chronicles important auctions of jewels from European royal collections over the years, with a focus on a recent high-profile sale of items that once belonged to Marie Antoinette.
Inclusion and Trace Element Characteristics of Emeralds from Swat Valley, Pakistan
Presents a detailed study of gemological properties, inclusion features, spectroscopic characteristics, and chemical composition of emeralds from this important source.
Natural-Color D-to-Z Diamonds: A Crystal-Clear Perspective
Examines a very large dataset of colorless to near-colorless diamonds submitted to GIA and evaluates their diamond type and spectroscopic properties.
Unique Raindrop Pattern of Turquoise from Hubei, China
Presents spectroscopic and chemical analysis of a new variety of turquoise with a rare raindrop pattern with saturated colors.
Color-Change Cat’s-Eye Diaspore
A 60.71 ct cabochon was recently submitted to the Tokyo lab for identification.
15.53 ct Pearl Discovered in Edible Oyster from the Ostreidae Family
A large natural pearl discovered in an edible oyster offers insight to the scientific pearl community.
Novelty Cut Diamond with Remarkable “Fire and Ice” Fluorescence
Synthetic Moissanite with Fraudulent GIA Inscription
GIA Johannesburg identifies fraudulent GIA inscriptions on several synthetic moissanites submitted as diamonds.
Vietnam: Shell Nuclei, Pearl Hatcheries, and Pearl Farming
Reports on a visit to a shell nucleus manufacturer and two pearl farms in northern Vietnam, which is emerging as a notable producer.
Trapiche-Type Emeralds from Pakistan
A Near-Field-Communication (NFC) Technology Device Embedded in Bead Cultured Pearls
The Carlsbad laboratory received for examination two dark-colored bead cultured pearls embedded with an electronic device from Jeremy Shepherd, CEO of Pearl Paradise.
Fall 2020 G&G Publication Information
This document provides the publication information for Gems & Gemology
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