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Alexandrite

Alexandrite is a vitreous stone with color-changing properties that give it a green tint in some light sources, and a purple one in others. Originally discovered in the Ural Mountains of Russia, but samples have since been retrieved from Sri Lanka, Brazil, and East Africa. It is a form of chrysoberyl, and is composed of aluminum, beryllium, and oxygen in the repeating unit BeAl2O4.

Chemical Formula

BeAl2O4

BirthStone Month

June

Gemstone Mineral

Chrysoberyl

Crystal Structure

Orthorhombic

Hardness

8.50

Specific Gravity

3.680 - 3.780

Double Refraction

1.746

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