Tourmaline has been known for a very long time
a peculiarity of tourmaline is its high energetic conductivity and the ability to rub
or heating to develop electrical attraction
The tourmaline captivates by its variety of colours. It can appear in all colours and show every imaginable colour combination:
the most frequent colour combination is black tourmaline - Schörl
the brown tourmaline is called Dravit
green tourmaline - verdelite - appears more rarely
and red tourmaline - rubelite
Absolute rarities are blue tourmaline - indigolith
and purple tourmaline - Apyrite
multicoloured tourmaline crystals are called polychromes
the watermelon tourmaline is a polychrome tourmaline with a red core and green edge
