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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Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
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Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
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G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
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Learn the basics of the GIA Cut Grading System for round brilliant cut diamonds to help pick out your perfect diamond.
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G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
Read MoreModern gemmologists and diamantaires are faced with a broad spectrum of colour and clarity treatments ranging from the simple to the highly sophisticated.
Read MoreThis second major article in a three-dimensional modelling study analyses fire – the visible extent of light dispersed into spectral colours.
Read MoreA mathematical model which can analyse how appearance factors depend on proportions.
Read MoreThis report focuses on recent products from Yehuda/Diascience, Koss & Schecter Diamonds (Genesis II) and Clarity Enhanced Diamond House (a subsidiary of Goldman Oved Diamond Co.).
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