Green is the classical color of the tourmaline. Its color ranges from a fine leek-green to a deep, dark green.
Formula: Na(Li, Al)3Al6B3Si6O27(OH)3(OH,F)
Hardness: 7 – 7.5
Density: 2.90 – 3.40 g/cm3
Refractive Index: 1.614 – 1.666 DR: 0.014 – 0.032
Color:green, yellowish-green, bluish-green
Countries of Origin:
Brazil, Nigeria, Namibia, Tanzania, Afghanistan, Pakistan, Mozambique, Madagascar, Zambia
Birthstone: October