Rough black tourmaline

Rough black tourmaline from Brazil.

It is a unique piece of rough black tourmaline, from Brazil.

Its approximate measurements are 14 cm x 15 cm x 10 cm and it weighs about 2,770 kg.

Because it is totally natural and in a raw state, it may shed small pieces as it is handled.

Black tourmaline is popularly used to counteract the radiation emitted by electronic devices. It is widely used as a protective stone, as it neutralizes negative energies.