A Fashioned Dyed Shell Imitation Pearl
An imitation is identified in a parcel of non-nacreous pearls submitted to the Mumbai laboratory.
New Chrysoprase Production from Western Australia
GIA’s Bangkok laboratory reports on a study of rough and cut chrysoprase from a newly discovered deposit in Western Australia.
Chocolate Opal
A common opal from Ethiopia examined in the New York laboratory bears a striking resemblance to a bar of chocolate.
Your Purchase Feeds: Vaibhav Global Limited’s Social-Impact Approach
Global retailer VGL offers ethically sourced jewelry while partnering with hunger-relief organizations to provide meals for children.
Uniquely Patterned Clouds in Sri Lankan Sapphire
Particle clouds with an interlocking triangular pattern are revealed in a blue sapphire from Sri Lanka.
Mystery Bubble in Spinel
An inclusion feature with a mobile bubble is examined in a spinel reportedly from Myanmar.
CVD Synthetic Fashioned to Imitate a Rough Natural Diamond
Reports on a CVD-grown synthetic diamond fashioned in the approximate shape of an octahedron.
A Classification Scheme of Natural Radiation Stain Morphology and Texture on Diamond
Offers a classification of radiation stain morphology and texture using photomicrography to supplement known characteristics of naturally irradiated diamonds.
Atypical Bead Cultured Pearls Identified in a Natural Pearl Necklace
The Mumbai laboratory encounters numerous small atypical bead cultured pearls drilled and strung alongside natural pearls.
Diverse Range of Organic-Rich Cores in South Sea Non-Bead Cultured “Keshi” Pearls
Examines the organic-rich cores of non-bead cultured “keshi” pearls from Pinctada maxima mollusks to distinguish them from natural pearls of the same species despite their similar internal structures.
Evidence of Heat Treatment in Spinel
Examination of inclusions in a red spinel reveals signs of heat treatment.
An Unusual Filled Cultured Pearl
A light gray near-round pearl exhibits an opening plugged with a drilled seed pearl.
In Memoriam: George R. Rossman
The gemological community mourns the loss of mineralogy professor George Rossman.
Quarterly Crystal: Spires on Moldavite
A rare specimen of moldavite tektite with unbroken spires from the Czech Republic is examined.
Records from a Luxurious Past: Gem Inventory of a Seventeenth-Century Armenian Merchant
Analyzes a 1688 probate inventory of Gregorio di Girach-Mirman’s extensive gemstone collection to highlight the global reach and influence of Armenian merchants in the early modern luxury trade.
Transparent Staurolite
A rare transparent dark red-brown freeform step-cut staurolite is examined in the Carlsbad laboratory.
Cartier and Myths Exhibition at Rome’s Capitoline Museums
An exploration of the Cartier and Myths exhibit, examining how Cartier jewelry engages with classical antiquity, mythology, and artistic traditions.
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