Uncommon Inclusion of Lazurite in Ruby from Mogok, Myanmar
A parcel of small rubies was received for identification at the S Gemmological Institute (SGI) gem lab in Yangon, Myanmar.
Pink Sapphires from Madagascar, Rose-Cut Colored Stones from the Baroque Era, Separating Blue Amber Localities, and More…
An overview of the Winter 2020 Gems & Gemology content.
Winter 2020 G&G Publication Information
This document provides the publication information for Gems & Gemology
American Gem Society Upcoming Events
The American Gem Society (AGS) announces two events for 2021: Confluence in April and Conclave in September.
2020 World Pearl Congress
The production of Chinese freshwater pearls faced little disruption from the global pandemic according to sources at the World Pearl Congress.
Blue “Graining” in Green-Yellow Diamond
Unusual color zoning likely indicates multiple treatments of a Fancy Intense green-yellow diamond.
Book Review: Beyond Fabergé: Imperial Russian Jewelry
Review of Beyond Fabergé: Imperial Russian Jewelry by Marie Betteley and David Schimmelpenninck van der Oye.
Spectral Analysis of Resin Imitation Ivory
Spectroscopic techniques prove key in separating resin-based imitation ivory from natural ivory.
Update on Inclusions in Emeralds from Davdar, China
Testing reveals interesting inclusions in Chinese emeralds to be calcite and dolomite.
Dendritic Inclusions in Nephrite from Dahua, China
Unique dendritic inclusions containing penninite may be a key indicator of origin for Dahua nephrite.
A New Phantom Quartz Imitation: Laser-Engraved Rock Crystal
Small cracks from laser engraving reveal the origin of these phantom quartz imitations.
Rare Intense Purplish Pink Montana Sapphire
A Montana sapphire of unusual size and color proves to be from the secondary deposit of Rock Creek.
Inclusions in Kenyan Rubies from the John Saul Mine
Very similar inclusion scenes featuring needles and thin films make rubies from Kenya hard to distinguish from Mogok rubies.
Zircon in Jadeite Jade
A doubly terminated zircon inclusion survives multiple treatments in a translucent bangle of jadeite jade.