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Alexandrite

Tsarstone collectors guide

Alexandrite Guide Forums

colors and hardness of alexandrite on Dec 24 2006, at 22:19 in Alexandite Questions and Answers
Alexandrites are normally green, yellow green, brownish green, or bluish green in daylight and red, pinkish red, brownish red, purple, or purple red under incandescent light. The hardness of alexandrite irrespective of color is always 8.5 on the Moh's scale.

 
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