natural alexandrite color change gemstone zultanite jewelry chrysoberyl 
natural alexandrite color change gemstone zultanite jewelry chrysoberyl

This Stone is one of the rarest types of chrysoberyl (BeAl2O4) with a mouse hardness of 8.5, with a specific gravity of 1.755 – 1.74.
It has an orthorhombic crystalline system and sometimes hexagonal appearance.
Available from transparent to opec, and transparent ones are priced higher.

According to the CIBJO World Confederation of Jewelers, only chrysoberyl with the ability to change color is considered “Alexandrite”.
This Stone is formed when beryllium and aluminum elements are combined and surprisingly small amounts of iron and titanium elements, especially chromium, are added.

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