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GEMS
Lesson 3 - Page 2

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Citrine is a yellow, brown color that is naturally caused by traces of organic matter. However, if you heat up clear quartz you can reproduce this yellowish color. Natural pale yellow citrine gemstones are rare compared to the brownish treat heated quartz.

Tiger eye quartz exhibits an chatoyant effect which is the shifting of light when the gem is moved, caused by fibrous inclusions. A skilled gemologist can craft a beautiful gem to capture this effect. Tiger eye should not be confused with the expensive Catís Eye, a variety of chrysoberyl, the third hardest mineral. 


Tiger eye


Citrine


Cat's Eye

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