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.
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.
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.
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.
Synthetic Moissanite with Fraudulent GIA Inscription
GIA Johannesburg identifies fraudulent GIA inscriptions on several synthetic moissanites submitted as diamonds.
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
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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