Tourmailne is a gemstone variety. The stones found in trigonal prismatic crystals which is often long and heavily straited with a rounded triangular cross section, along the length of some crystal colour variation may also occur.Tourmaline are found in different colours some time in one stone you will see two colours which is called bi coloured stones and tri colour stones are also found.The stones famious in tourmaline are rubelite which is red and the most expensive in tourmaline, Indicolite which is in blue colour, Dravite from disttrict Drave Austria which is brown to dark brown in colour, Achroite which is mostly colourless, Watermelon because it has a pink center and a green rim, Green and yellow which is common, Schrol in black colour always opaque.Tourmalin are found in Brazil, Austria, USA , Canada, Srilanka, Madagascar, Afghanistan, Pakistan