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Tanzanite

 

Tanzanite is the blue/purple variety of the mineral zoisite which was discovered in the Meralani (Merelani) Hills of Northern Tanzania in 1967, near the city of Arusha. It is used as a gemstone.

 

Tanzanite is noted for its remarkably strong trichroism, appearing alternately sapphire blue, violet, and burgundy depending on crystal orientation.

 

Tanzanite in its rough state is usually a reddish brown color.

It requires artificial heat treatment to 600 °C in a gemological oven to bring out the blue violet of the stone.

 

Tanzanite is a rare gem. It is found mostly in the foothills of Mount Kilimanjaro.

The mineral is named after Tanzania, the country where it was discovered.


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