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Husband and wife gaze happily at emerald rough found in a Colombian mine.
Article
Colombian Emerald Industry: Winds of Change

Andy Lucas, GIA’s education manager of field gemmology, researches and documents the mine to market journey of gemstones. Lucas shares the changes he observed in Colombia’s major emerald mining and cutting areas in a presentation he gave at the 2017 JCK Las Vegas show.

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Article
Carnegie Scientists Use Diamond Presses to Study Planet Formation

Research using diamond presses gives insight into planetary formation

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Mining Diamonds in the Canadian Arctic: The Diavik Mine

Located near the Arctic Circle, Diavik is one of the world’s richest diamond deposits and a leader in sustainable mining.

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Man in a hard hat sits in an underground emerald mine.
Article
Geologist’s Newest Mission: Share the Love of Coloured Gemstones

African-born coloured stone specialist visits America and changes his life forever; finding love, earning his GG and starting a new career.

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Walstromite inclusion with fan-shaped black fractures.
D-Colour Natural IIa Diamond with Walstromite Inclusion

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

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Fancy Dark brown to Fancy black Marange diamonds
Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions

Characterises a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.

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Woman shines a light on huge crystals as she crawls among them.
Article
Gemmologist Aims to Pique World’s Curiosity in Giant Crystals

‘Adventure seeker’ crawls through underground caves to reach and research giant selenite crystals – then shares her knowledge with the world.

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Wedding couple: Groom in black tuxedo and woman in white gown hold hands and gaze at one another. California hills in the background.
Article
Love in Tucson: The ‘Stars Aligned’ for Geologist and Designer at GIA Alumni Party

They met in the queue to get into the GIA Alumni Association Tucson party – and changed the course of their lives forever.

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Rough CLIPPIR diamonds
The Very Deep Origin of the World’s Biggest Diamonds

Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.

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Colombian independent miners
Colombian Emerald Industry: Winds of Change

A first-hand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.

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