Tanzanite and Spinel Physical Properties

Tanzanite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.35

3.64-3.66

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect {010}, imperfect {100}

None, but may exhibit slight parting

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

MgAl₂O₄

Tanzanite and Spinel Chemical Formula

While comparing Tanzanite and Spinel 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 Spinel chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Spinel- MgAl₂O₄

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Tanzanite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.