Tanzanite and Hardystonite Physical Properties

Tanzanite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.353.396-3.443

1 7.18

1.5 Fracture

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

Brittle, Metallic

1.6 Cleavage

Perfect {010}, imperfect {100}

[001] good, [100] and [110] fair

1.7 Mohs Hardness

6.5-73-4

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Tanzanite and Hardystonite Chemical Formula

While comparing Tanzanite and Hardystonite 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 Hardystonite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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Tanzanite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.