GIA researcher analyses and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapour deposition process.
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Bows have been a popular motif and finishing touch in jewellery and fashion from time immemorial, recurring and adapting to reflect the style of the era.
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Looking for a gift for someone special? December’s birthstones offer a treat for every taste, style and personality – even if it’s not their birth month.
Read MoreThis collection of jewellery images illustrates how metalwork techniques showcase gemstone and jewellery designs.
Read MoreObservations made at GIA on 858 GE-processed diamonds revealed several interesting features that may be diagnostic of this kind of diamond. Specifically, a significant percentage exhibited a slightly hazy appearance, noticeable internal graining and other unusual internal features.
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How variations in UV lamp output can affect observed fluorescence colour and intensity.
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A new microlithography process developed to create high-resolution diffraction grating patterns on portions of certain facets can improve the dispersion of light and thus the amount of “fire” in a diamond.
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All jewellery professionals are familiar with the city of Shenzhen, a global jewellery manufacturing centre and a leader of China’s fast-growing gem and jewellery industry. Join the GIA team as we tour the city and discover more about its leading jewellery brands.
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Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.
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This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
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