Tourmaline The name comes from the Sinhalese word "Thuramali. The tourmaline group is very varied and comes in many colours including bi and tri colour specimens. Other sought after varients are indoclite and rubellite. This gem is often confused with many others due to the number of colours it comes in. It has a mohls hardess of 7-7.5 and a refractive index of 1.614-1.666.
Watermelon Tourmaline