18.71ct Octagon Cut Tourmaline 18x13mm

Tourmalines are found in a wide range of colours, pink, green, blue, orange, yellow, brown, black, and colourless. Bi-coloured Tourmalines are also common and stones which are coloured pink to green are known as watermelon tourmaline. Tourmalines can also display cat's eye chatoyancy, which is caused by parallel fibres running through the stone.;Tourmaline is found in many countries including Madagascar, Brazil, USA, Burma, Sri Lanka, Botswana and Namibia, Zambia and Afghanistan. ;Stone Size (mm): 17.96x12.70x8.95;Carat Weight (ct): 18.71