The discovery of diamonds in South Africa in early 1867 marked the start of an historic period of diamond exploration.
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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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A diamond is proven to have a superdeep origin through an inclusion of CaSiO3-walstromite.
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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.
Read More‘Adventure seeker’ crawls through underground caves to reach and research giant selenite crystals – then shares her knowledge with the world.
Read MoreThey 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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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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A first-hand look at Colombia’s emerald mines and the cutting and trading industry in Bogotá.
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Examines the sources, colour, texture and chemical composition of jadeite from Japanese deposits.
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Reviews the properties of exceptionally pure grandidierite from a new source.
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