Tanzanite and Sapphire Physical Properties

Tanzanite

Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

insoluble

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.35

3.95-4.03

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect {010}, imperfect {100}

None, but may exhibit parting

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Al ₂ O ₃

Tanzanite and Sapphire Chemical Formula

While comparing Tanzanite and Sapphire 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 Sapphire chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Sapphire- Al ₂ O ₃

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Tanzanite and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.