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Tanzanite
Tanzanite

Andalusite
Andalusite



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Tanzanite
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Andalusite

Tanzanite and Andalusite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
Hard
3.35
Uneven, Conchoidal
Perfect {010}, imperfect {100}
6.5-7
Ca2Al3(SiO4)3(OH)
 
-
-
-
3.05-3.21
Uneven, Subconchoidal, Splintery
Good on {110}, poor on {100}
7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Tanzanite and Andalusite Chemical Formula

While comparing Tanzanite and Andalusite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Tanzanite and Andalusite chemical formula.

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Tanzanite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite Vs Andalusite during the identification of gemstone. Specific gravity of Tanzanite is whereas that of Andalusite is .