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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Everyone would agree that exposure and focus are the most critical aspects to consider when photographing gems or jewellery. But there are two other practices that take this kind of photography even further: lighting and positioning of the gem or jewel. The first component ensures a successful photograph. The second makes a picture interesting – or even compelling.
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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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A bluish violet sapphire shows surprising effects under lab examination.
Read MoreBlue diffusion-treated sapphires have become a subject of considerable controversy since their introduction in significant quantities a few years ago.
Read MoreBlue diffusion-treated sapphires are becoming more prevalent than ever before.
Read MoreAn important source of gem-quality sapphire and its inclusions is found in Colombia.
Read MoreThis article reports the results of a series of experiments conducted to explain the phenomenon of induced fingerprints.
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