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More about Tanzanite

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Tanzanite is very rare and can be found in the hills of Merelani, in northern Tanzania. Consequently there is only enough tanzanite in the ground to last another twenty years!

Tanzanite has a Mohs hardness of 6.5 to 7 and is therefore considered durable enough to be worn in most types of jewellery. The dark blue stone is often mistaken for sapphire and generally the larger the tanzanite, the deeper the colour. Tanzanites are routinely heat treated to produce their colour. Generally, it should be assumed that the tanzanites we supply have been heat treated too, unless specified otherwise.

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