Dr James Shigley shares how GIA determines coloured stone origin and the mysteries of diamond origin.
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The phrase “light performance” gets a lot of loose use in the diamond trade, but what does it mean when someone is actually looking at a diamond?
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Russell Shor reflects on the people, gems and stories he’s encountered as he’s covered the industry over the years.
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Don’t judge a yellow gem by its colour alone. A variety of gemstones also come in shades of yellow, from diamonds to citrine to garnets.
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GIA scientists recently presented their latest research on diamond tagging and the cause of grey-blue-violet colour in diamonds.
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The economic impact of the coronavirus in mainland China and Hong Kong. Plus, an update on the diamond market and gold jewellery.
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GIA researchers in New York recently had the opportunity to examine one of the most interesting and unique diamond crystals ever found.
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Patrick O’Shea’s life’s journey led him down many career paths until they all came together as a designer who specialises in masonic jewellery.
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2019: A year of ups and downs in the gem and jewellery industry, including diamonds, retail, auction sales and laboratory-grown diamonds.
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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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