Gemological Characteristics of Low-Temperature “Gel-Filled” Turquoise
Update from Mozambique’s Ruby Mines
A field gemology team from GIA provides an update on the ruby mining operations around Montepuez.
Synthetic Sapphire with Rose Channels
Rose channels and twinning planes are observed in light purplish blue synthetic corundum.
Inaugural Turquoise United Conference
A report on the first-ever Turquoise United conference in Albuquerque, New Mexico.
Fall 2022 G&G Available Now
Book Review: Pegmatites and Their Gem Minerals
Review of Pegmatites and Their Gem Minerals, by Michael Menzies and Jeffrey Scovil.
Book Review: Pegmatites and Their Gem Minerals
GIA Joins Watch & Jewellery Initiative 2030
Focus on supporting ambitious goals, developing education content
The Geographic Origin of Diamonds, Sapphire from China, and Pigments Sourced from Gem Materials
Career Fair Powered by GIA Returns to Carlsbad
The largest in-person career fair in the gem and jewelry industry
A Large Aquamarine with Unusual Etch Features from Xinjiang, China
Unique natural etch pattern and dissolution cavities are observed in a large aquamarine crystal.
Large Diamond Inclusion in Diamond
A fascinating diamond crystal inclusion displaying a transparent, ghost-like appearance is identified in a Faint green diamond.
“Boomerang” Inclusion in a Rough Topaz
A Zircon with Strong Photochromic Effect
Yellow Sapphires with Unstable Color
A lab in Bangkok shares study on color stability in yellow sapphire.
Unusual Glass-and-Quartz Triplet Imitation of Emerald
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