Abstracts of speaker presentations from the “New Technologies and Techniques” session of GIA’s 2018 International Gemological Symposium.

Poster abstracts on “General Gemology and Jewelry” from GIA’s 2018 International Gemological Symposium.

Abstracts of speaker presentations from the “Diamond Identification” session of GIA’s 2018 International Gemological Symposium.

Abstracts of speaker presentations from the “Gem Localities and Formation” session of GIA’s 2018 International Gemological Symposium.

Abstracts of speaker presentations from the “General Gemology and Jewelry” session of GIA’s 2018 International Gemological Symposium.

Abstracts of speaker presentations from the “New Technologies and Techniques” session of GIA’s 2018 International Gemological Symposium.

Poster abstracts on “Colored Stones and Pearls” from GIA’s 2018 International Gemological Symposium.

Abstracts of speaker presentations from the “Gem Characterization” session of GIA’s 2018 International Gemological Symposium.

Poster abstracts on “Gem Characterization” from GIA’s 2018 International Gemological Symposium.

自然は秋になると、鮮やかなパレットのように変わる木の葉の色や万華鏡のように色鮮やかな素晴らしい夕日を見せてくれます。

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

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

Gold: Vortex, Virtues, and Values was hosted by Initiatives in Art and Culture (IAC) at Bohemian National Hall in New York City, April 12–13. Now in its eighth year, the conference has become an annual industry gathering for those looking to evaluate the market, discover exceptional work, and discuss key gold-related issues.

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

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

aser confocal microscopy, a very reliable method of revealing surface micro-features, is used on an HPHT synthetic diamond to reveal growth structures.

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

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

An unusual assembled stone is examined at GIA’s New York lab.

Rare pearls, along with their shell, are studied in the Hong Kong lab.