Black tourmaline in natural raw form
Black tourmaline also known as Schorl.
Also found within quartz and known as tourmalated quartz.
Tourmaline can be found in many colours including black, red, pink, green, brown and blue.
Brown tourmaline is also known as Dravite.
Blue tourmaline is also known as indicolite or indigolite. This crystal is rare to find.