Tourmaline appears in so many colours and it is widely thought to be one of the most colourful of gemstones. Tourmaline is a combination of several interrelated minerals in terms of its physical and chemical properties. Tourmaline is mined throughout the world in many different climates and conditions such as several African Nations as well as Sri Lanka and USA. The gemstone is associated with shield like qualities defending against negative energies. Tourmaline is reasonably durable with a hardness varying from 7-7.5/ 10 on the Mohs scale.
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