Mineral inclusions trapped in diamonds reveal the continents’ construction – and help GIA researchers date diamonds.
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Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
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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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Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
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Circumnavigate the boreal reaches of the globe to explore gems from polar regions.
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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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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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Under magnification, a round brilliant diamond features a pyrope garnet inclusion in an aesthetically pleasing shape.
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An inclusion outlined by minute graphite crystals within a diamond create an octahedral shape.
Read MoreDr Evan Smith, Ph.D., GIA research scientist, has dedicated his work to methodically characterising the inclusions found in rare diamonds. In this video presentation recorded at the 2017 JCK Las Vegas show, Smith shares his findings on the unexpected ori
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