Learn how the structure, inclusions and properties of some gemstones interact with light to create unusual visual effects.
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GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.
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Among the collection assembled by Dr Edward Gübelin are a number of uncommon gemstones from many worldwide localities.
Read MoreThe gem was named after the young Alexander II, heir apparent to the throne. It caught the country’s attention because its red and green colours mirrored the Imperial Russian flag.
Read MoreLearn about the factors that make alexandrite so desirable.
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Alexandrite, with its chameleon-like qualities, is a rare variety of the mineral chrysoberyl. Its colour can be a lovely green in daylight or fluorescent light, changing to brownish or purplish red in the incandescent light from a lamp or candle flame.
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Green gemstones, which can uplift and heal our spirits, have been popular gem choices ever since we began to adorn ourselves with jewellery.
Read MoreExamination of a chatoyant alexandrite cabochon.
Read MoreA compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewellery manufacturing techniques and industry trends.
Read MoreLearn about alexandrite's durability and how to care for your alexandrite jewellery.
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