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An oval shaped bicolor tanzanite has purple on each side with blue-green in the middle.
Article
December Blues: Birthstone Gifts that Will Delight

Looking for a gift for someone special? December’s birthstones offer a treat for every taste, style and personality – even if it’s not their birth month.

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A rectangle-shaped gold box, decorated with filigree, granulation and gems.
Article
Metalwork Takes a Bow: Techniques that Enhance Gemstone Jewellery

This collection of jewellery images illustrates how metalwork techniques showcase gemstone and jewellery designs.

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The gems spell out “The 2000th Gem Stone Design.”
Article
Gemstone ‘Paintings’ Tell Story of a Master Craftsman, Gem and Jewellery Mentor

A jeweller who quietly built up a circle of inspiration and influence lives on in generations of GIA-educated jewellers and gemmologists.

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A miner in northern Tanzania examines rhodolite.
Gemstone Guidebook Project

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

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Garnets under daylight-equivalent (left) and incandescent light (right).
Discovery of Colour-Change Chrome Grossular Garnets from Ethiopia

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

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Timeline showing the use of garnets in different eras from 300 BCE to 700 CE
An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road

Analyses the chemical composition and inclusion characteristics of this ancient artefact.

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Spring 2000 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.

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Starlet in sunglasses above title “Hooray for Hollywood
Article
M.D. Hohenstine’s Gem Displays: The Process of Creating Popular Window Art with Loose Gemstones

Jeweler M.D. Hohenstine’s spectacular window displays were a beloved tradition in downtown Columbus, Ohio, for more than 50 years.

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Vanadium and Chromium-Bearing Pink Pyrope Garnet: Characterisation and Quantitative Colorimetric Analysis

This type of pink pyrope garnet, believed to have been mined in Tanzania, shows a distinct colour-change phenomenon resulting from its unique chemical composition.

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Sphalerite inclusion in Namibian demantoid.
Sphalerite Inclusions in Namibian Demantoid

A rare inclusion scene is found in a garnet crystal from Namibia.

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