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Tourmaline


Tourmaline




Intro


Tourmaline is a common mineral. It can range from odorless to red, blue, brown, violet, green, orange, and yellow. This gem has a vitreous luster, meaning glass as appearance. It also has a trigonal crystal system. On the Mohs Hardness Scale, it is on the 7-7.5 scale, near defining mineral (10). Since this is a Tourmaline, its pleochroism is moderate to strong. Click here for all Tourmaline pleochroisms.



Month and Zodiac Sign


Tourmaline's associated month is October, making it associated with Saggitarius and Scorpio.



Quick Facts


Chemical Composition

(Al, Fe, Li, Mg, Mn)3(Al, Cr, Fe, V)6(BO3)3(Si, Al, B)6O18(OH, F)6


Luster

Vitreous


Crystal System

Trigonal


Zodiac Sign

Saggitarius


Associated Month

October


Hardness (Mohs Hardness Scale)

7-8


Specific Gravity

3.06 (+0.2, -0.06)


Pleochroism

Moderate to Strong