Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
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Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals ever unearthed.
Read MoreNature gives us a brilliant palette of colour-changing leaves and a spectacular kaleidoscope of colourful sunsets during the autumn season.
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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Enter a world not well-known in the West—the world of the maharajas and their jewellery, coveted by the modern-day moguls of business, entertainment and royalty. See the fantastic works of art made today in the form of enamelled Kundan meena jewellery and the regal look of polki diamonds.
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G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
Read MoreMost Russian hydrothermal synthetic rubies and pink, orange, green, blue and violet sapphires—coloured by chromium and/or nickel—reveal diagnostic zigzag or mosaic-like growth structures associated with colour zoning.
Read MoreRuby crystals from Southeast Asia with a fixed six-rayed star, similar in effect to trapiche emeralds from Colombia, are described.
Read MoreThis article presents the methods and instruments needed to analyse the internal growth structures of corundum.
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The authors present the mineralogical and gemmological properties of rubies found recently in the Morogoro area of Tanzania that have many features in common with rubies from Myanmar (Burma) and other comparable marble-type deposits.
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