A dichroscope is used to see whether a piece of gemstone has more than one colour.

How to learn to tell an expensive ruby from a cheap imitation

Van Cleef & Arpels L’École School of Jewelry Arts offers courses in Hong Kong for aspiring gemologists that will show them how to tell the difference between a real gem and an imposter

Topic |   High Jewellery

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A dichroscope is used to see whether a piece of gemstone has more than one colour.
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