Learn how to use the London dichroscope, a simple tool that helps us view the pleochroic colours of doubly refractive gemstones. It is the perfect tool for gemmologists because it is portable, easy to use, and the results are easy to decipher. It can help to identify some gemstones on its own, but often it is a good tool to use alongside other pieces of gemmological equipment.

This video is brought to you by Gem-A education in association with Julia Griffith FGA DGA EG.

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