This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.
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Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Read MoreGreater amounts of colourless sapphire—promoted primarily as diamond substitutes, but also as natural gemstones—have been seen in the gem market during the past decade.
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G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
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G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
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This article, from the Autumn 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.
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Analysis reveals blue lead glass filling in a sapphire that has an overall green bodycolour as a result of the filling’s combination with natural yellow colour.
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A combination of trace-element analysis and UV-visible spectroscopy clearly indicated that the yellow colour originated from the much more effective chromophore known as “trapped holes” associated with the trace amount of Mg and Cr in this stone.
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Green gemstones, which can uplift and heal our spirits, have been popular gem choices ever since we began to adorn ourselves with jewellery.
Read MoreThe fashion trend of colourblocking can be found in the artistic combinations of colour in multicoloured gemstones known for their colour zoning or banding.
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