Alexandrite – $12,000 per carat

 

Alexandrite (Credit: daysjewelers.com)

Alexandrite (Credit: daysjewelers.com)

Alexandrite (BeAl2O4) is a type of chrysoberyl that was found in the Ural Mountains, Russia in the 1830’s. You may have seen the incredible changing color of this mineral where it appears to be emerald in light and ruby red in darkness. The difference between alexandrite and chrysoberyl is the presence of iron, titanium, and chromium as impurities within alexandrite.

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