A Zircon with Strong Photochromic Effect
Photochromic zircon shows significant color change from medium light greenish blue to very dark yellowish green.
The Type IIb De Beers Cullinan Blue Diamond
GIA’s New York laboratory reports on a 15.10 ct Fancy Vivid blue cut-cornered rectangular step cut named the De Beers Cullinan Blue diamond.
GIA Alumni Collective
GIA’s new Alumni Collective connects graduates around the world to foster success in the gem and jewelry industry.
A Reported Cassis Pearl from Key West, Florida
A unique Cassis pearl discovered in the early 1960s is examined at the Carlsbad laboratory.
Rare Orange Benitoite
The Carlsbad laboratory reports on a large and exceptionally rare example of bright orange benitoite.
Three-Rayed Asterism in Quartz
Rare optical phenomenon observed in four star quartz cabochons from Brazil.
Summer 2022 G&G Publication Information
This document provides the publication information for Gems & Gemology
Eye Pattern in a Rock Fragment
A partially polished rock fragment exhibits a very realistic eye pattern.
Flux-Grown Synthetic Beryl Overgrowth
Fracture-Filled Emerald with Mysterious Filler Patterns
Filler patterns resembling a labyrinth are observed in emerald fractures.
Myne London: Sourcing Emeralds with a Mission
A London-based company aims to responsibly source emeralds from Swat Valley, Pakistan, while supporting women in business and education.
Ruby: An Expensive Mistake
A reported untreated ruby from Mozambique shows evidence of heat treatment.
Bicolor Cuprian Tourmaline
The Tokyo laboratory reports on a bicolor copper-bearing tourmaline with bodycolor ranging from bluish green to dark yellowish green.
The Grass Is Always Greener…
The Carlsbad laboratory reports on a Fancy grayish green diamond with radiation stains resembling blades of grass.
10 ct HPHT-Treated CVD Laboratory-Grown Diamond
Testing a 10 ct CVD laboratory-grown diamond reveals evidence of HPHT treatment.
Interesting Set of Blue “Rough” Gemstones
Four blue rough gemstones are submitted as natural sapphire, but the Carlsbad laboratory determines only one is natural.
RFID Device Embedded in South Sea Bead Cultured Pearl Necklaces
The Bangkok laboratory reports an increasing number of RFID devices embedded in pearls, including two recently submitted South Sea bead cultured pearl necklaces.
Apatite Cluster in Zambian Emerald
Blue Apatite in Tanzanian Garnet
A pyrope-spessartine garnet displays bright blue crystal inclusions ensconced among intersecting needles.
.jpg "YMAL GIA Ed")
