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GIA's Gübelin Gem Project: Tourmaline

Tourmalines have a very complex chemical composition, and more than a dozen mineral species are recognised within this group.

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Tourmaline
Article
Tourmaline History and Lore

Somewhere in Brazil in the 1500s, a Spanish conquistador washed the dirt from a green tourmaline crystal and confused the vibrant gem with emerald. His confusion lived on until scientists recognised tourmaline as a distinct mineral species in the 1800s.

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Tourmaline
Article
Tourmaline Description

Tourmalines come in a wide variety of exciting colours. In fact, tourmaline has one of the widest colour ranges of any gem species, occurring in various shades of virtually every hue.

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Tourmaline
Article
Tourmaline Quality Factors

Learn about the factors that make tourmaline so desirable.

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Three light-to-medium blue carved sculptures sit in a line – from larger to smaller.
Article
Making the Cut: The Art and Science of Fantasy Carving

Gem cutters - whether “gem whisperers” or mathematicians - create breathtakingly artistic individual gems and sculptures.

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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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The octopus head is a baroque Tahitian cultured pearl and its arms are made of black, yellow and white diamond (in a striped pattern) set in black-plated 18K gold.
Article
A Tropical Paradise of Ocean-Inspired Jewellery and Gemstones

Escape to a warm-water paradise in your mind with these jewels that formed in the sea, are inspired by marine life and evoke the ocean’s essence.

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People meet and mingle at the entrance to the JCK Show.
Article
Headwinds Slow 2019 Vegas Business, Lab-grown Diamonds Proliferate

Decent demand for finished jewellery, but less for loose gems. Plus: Lab-grown diamonds and responsible, sustainable business practices.

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Article
The Glory of Green Gems

Green gemstones, which can uplift and heal our spirits, have been popular gem choices ever since we began to adorn ourselves with jewellery.

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Multi-colored gems are superimposed on an image of glacier peaks.
Article
Gems and Minerals from the Sub-Arctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

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