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A large group of people outside on GIA’s Carlsbad, California  campus.
Article
Guardians of Trust: GIA’s Innovative Research, Instruments and Services

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

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A round, bright red gem displayed on a dark gray background.
Article
The Red Hot Gems of Summer

These red, pink and orange hued gems evoke passion and excitement – and are sure-fire accessories for sultry summer days.

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Article
And Then Came the Fantasy Cut

Once upon a time, gem cutting was a strict craft bound by centuries of tradition. Then Bernd Munsteiner (b. 1943) invented the fantasy cut.

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Mt. Mica: a renaissance in Maine’s gem tourmaline production

The Mt. Mica area in southwestern Maine has been mined for tourmaline and other pegmatite gems since the 1820s.

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Liddicoatite Tourmaline from Anjanabonoina, Madagascar

Liddicoatite, a calcium-rich lithium tourmaline, was recognised as a separate mineral species in 1977, and named in honour of Richard T. Liddicoat.

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An Update on “Paraíba” Tourmaline from Brazil

“Paraíba” tourmalines continue to be recovered in small amounts from north-eastern Brazil.

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Multicoloured Bismuth-bearing Tourmaline from Lundazi, Zambia

Tourmalines from an alluvial deposit near Lundazi in Zambia consist of colour-zoned pink/colourless/yellow-green “watermelon” nodules.

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Copper and tenorite inclusions in cuprian-elbaite tourmaline from Paraíba, Brazil

Inclusions of native copper and tenorite (CuO) were found in greyish-green elbaite from São José da Batalha, Paraíba, Brazil.

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Gem-quality cuprian-elbaite tourmalines from São José Da Batalha, Paraíba, Brazil

Unusually vivid tourmalines from the state of Paraiba, in north-eastern Brazil, have attracted great interest since they first appeared on the international gem market in 1989.

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"Modern" Jewellery: Retro to Abstract

A review of mid-20th century jewellery styles.

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