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Tanzanite


Tanzanite




Intro


Tanzanite is a common gemstone. It is available in Blue and Purple. This gem has a vitreous luster, meaning glass as appearance. It also has an orthohombic crystal system. On the Mohs Hardness Scale, it is on the 6-6.5 scale, near defining mineral (10). This gemstone's pleochroism is present.



Month and Zodiac Sign


Tanzanite's associated month is December, making it associated with Saggitarius.



Quick Facts


Chemical Composition

Ca2Al3(SiO4)3(OH)


Luster

Vitreous


Crystal System

Orthohombic


Zodiac Sign

Saggitarius


Associated Month

December


Hardness (Mohs Hardness Scale)

6-6.5


Specific Gravity

3.1-3.38


Pleochroism

Present, dischroism or trichroism (depending on heat treatment)