The Gemological Characteristics of Chinese Peridot
Chinese peridot is similar to peridots from other localities.
A Gemological Study of Turquoise in China
Chinese gem-quality turquoise is sky blue, greenish blue, or bluish green in color.
The Sapphires of Mingxi, Fujian Province, China
Blue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).
Infrared Spectroscopy in Gem Identification
The authors describe the new Nicolet 60SX Fourier transform infrared spectrometer recently acquired by GIA's Research Department.
A Study of the General Electric Synthetic Jadeite
Synthetic jadeite, the result of an experimental study, is examined in this article.
Jewelry of the 1980s: A Retrospective
Fluctuations in the diamond market brought a new focus in jewelry on small diamonds and colored stones.
Unusual Hematite Lattice Pattern in Plagioclase Feldspar
Elongated hematite platelets form a lattice pattern in a sunstone cabochon.
Mask Inhabiting a Natural Diamond
The mirror image of a feather inclusion in a natural diamond resembles a theater mask.
Quarterly Crystal: Magnesioaxinite
A color-change magnesioaxinite crystal specimen from Tanzania contains an interesting inclusion scene.
Written Characters in Black Opal
Play-of-color patches in black opal display interesting written character patterns.
18th Annual Sinkankas Symposium
The 2022 Sinkankas Symposium will cover alexandrite and other color-change gemstones.
Cuprite and Malachite in Agate from the Yanyuan Region, Sichuan
Rare identification of two kinds of copper-bearing inclusions in agate from the Yanyuan region in China.
Large, Rare Faceted Collector Gems
Rarely faceted colemanite and phosphophyllite of record-breaking size were on display at the AGTA show.
One-of-a-Kind Designs from Zoltan David
Iconic jewelry designer Zoltan David continues on his path of exploration in metalsmithing after 42 years of creating his one-of-a-kind designs.
Michael Traurig: An Opal Dealer’s Battle with COVID-19
Michael Traurig celebrates a return to Tucson after his COVID-19 recovery and recalls his family’s history in the business.
A Pink Sapphire Ring with a Message
Exquisite triple-halo pink sapphire ring commemorates breast cancer survival and raises awareness for others.
Puzzle-Like Gemstone Designs
An expansive collection of unique gemstone carvings from Steve Walters was on display at the 2022 AGTA show.
Social Media Success for Black Opal Direct
Black Opal Direct’s use of social media increases sales during the COVID-19 pandemic.
Dyed Fluorite
Testing two samples of green rough submitted for emerald identification reveals dye concentrations along fractures.
HPHT-Processed Natural Type Ia Diamond
New York laboratory receives resubmission of HPHT-treated diamond that changed from a dark yellowish brown to a deep yellow-orange during treatment.
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