Natural Diamond with Extensive Network of Etch Channels
Numerous etch channels are observed in a 5.19 ct type IIa natural diamond.
Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
Rare Orange Benitoite
The Carlsbad laboratory reports on a large and exceptionally rare example of bright orange benitoite.
GIA Alumni Collective
GIA’s new Alumni Collective connects graduates around the world to foster success in the gem and jewelry industry.
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
The Grass Is Always Greener…
The Carlsbad laboratory reports on a Fancy grayish green diamond with radiation stains resembling blades of grass.
Apatite Cluster in Zambian Emerald
Blue Apatite in Tanzanian Garnet
A pyrope-spessartine garnet displays bright blue crystal inclusions ensconced among intersecting needles.
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.
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.
Quarterly Crystal: Cinnabar in Fluorite
Trigonal cinnabar inclusions are identified in a crystal cluster of fluorite and calcite.
Bicolor Cuprian Tourmaline
The Tokyo laboratory reports on a bicolor copper-bearing tourmaline with bodycolor ranging from bluish green to dark yellowish green.
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.