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Garnets under daylight-equivalent (left) and incandescent light (right).

Discovery of Colour-Change Chrome Grossular Garnets from Ethiopia

Ziyin Sun, Aaron C. Palke, Nathan D. Renfro, Heidi Breitzmann, Dylan Hand, and Jonathan Muyal, August 9, 2018

The first known group of colour-change gem-quality chrome grossular garnet, reportedly from Ethiopia, is examined in GIA’s Carlsbad lab.

$Walstromite inclusion with fan-shaped black fractures.$

D-Colour Natural IIa Diamond with Walstromite Inclusion

Ying Ma, Huihuang Li, Xiaoxia Zhu, Ting Ding, Taijin Lu, and Zhili Qiu, August 9, 2018

A diamond is proven to have a superdeep origin through an inclusion of CaSiO₃-walstromite.

These rubies were determined to be glass filled, partly due to the use of the DiamondView.

Separating Glass-Filled Rubies Using the DiamondView

Larry Tai-An Lai, August 9, 2018

The DiamondView instrument is able to identify glass as the filler in a pair of heart-shaped rubies.

Update on Trace-Element Chemical Characteristics of Golden Sheen Sapphire

Makoto Miura, Yusuke Katsurada, and Kazuko Saruwatari, August 9, 2018

An update the gemmological and chemical characteristics of golden sheen sapphires from Kenya.

Gem cutters in Jaipur wear masks provided by AGTA.

Gemstones and Sustainable Development Knowledge Hub

Jennifer-Lynn Archuleta and Aaron Palke, August 9, 2018

Projects developed by the GemHub to benefit miners, cutters, and others involved in the gem and jewellery industry.

Two white jade bracelets with dark color patches.

Nephrite Bracelet with Filled Cavity

Jianjun Li, Guihua Li, and Haixia Chen, August 9, 2018

A jade bracelet contains unusual fillers, used to create a smooth surface.

Barbara Palumbo, Monica Stephenson, and Sarah Yood speak at the conference.

IAC Conference on Responsible Gold

Olga González, August 9, 2018

A report from the eighth annual International Gold Conference, held in New York on 12-13 April 2018.

A miner in northern Tanzania examines rhodolite.

Gemstone Guidebook Project

Jennifer-Lynn Archuleta, August 9, 2018

A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.

A green-blue specimen was identified as Maxixe-type beryl.

Green-Blue Maxixe-Type Beryl

Gagan Choudhary
, August 9, 2018

A transparent greenish-blue pear-shaped gemstone, reportedly from Madagascar, is discovered to be a Maxixe-type beryl.

The wax-impregnated bangle (left) showed bluish fluorescence under long-wave UV.

Strong Fluorescence in B-Jade Impregnated with Wax

Larry Tai-An Lai, August 9, 2018

A bangle is an example of the misconception that B jade is only impregnated by resin, when in fact wax-impregnated jadeite is also considered B-jade.

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