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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 face-up view of a cushion cut diamond with blue color.
Article
Gems & Gemology’s 7 Most Unusual Encounters from 2019

Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.

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An Interesting Rose Quartz from Madagascar

A new find of rose quartz from Madagascar contained some unusual inclusions.

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Bismuthinite inclusions in rose quartz from Madagascar

Inclusions visible to the naked eye are common in almost all varieties of quartz apart from rose quartz.

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Three pieces of labradorite with yellow, blue and green flashes of color.
Article
Optical Effects of Phenomenal Cabochons

Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.

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Venetian mask cloud inclusion
Article
Diamonds Under the Scope

Peer through a microscope and discover another world of gems. Inclusions reveal the gem’s journey from deep within the earth to its surface.

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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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Rough diamond, yellow in colour
Article
Diamond Research Gives Clues to the Formation of the Continents

Mineral inclusions trapped in diamonds reveal the continents’ construction – and help GIA researchers date diamonds.

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Raman analysis identified the horse-shaped inclusion as phlogopite mica.
A Horse-Shaped Inclusion in Pink Sapphire from Mozambique

Microscopic examination of a Mozambican pink sapphire reveals an inclusion with a surprising shape and composition.

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Topaz from Pakistan with microlite inclusions.
Microlite Crystals in Topaz from Pakistan

Aesthetically pleasing inclusions are found in topaz from Pakistan’s Shigar Valley.

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