Toumalines have one of the widest colour ranges of all gemstones. It is known under different names for certain colours. For example: Rubellite is reddish pink, chrome tourmaline is an intense dark green, and there is also bi-colour tourmaline which has more than one colour.
Tourmaline came into the spotlight during the 19th century and by the 20th century it's supply began to expand.
Sources: USA, Russia, Brazil, Kenya.
Hardness: 7-7.5 on Mohs scale.
Tourmaline is an alternative birthstone for October.
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