Tanzanite and Star Sapphire Physical Properties

Tanzanite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.35

3.90-4.05

1.5 Fracture

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

Not Available

1.6 Cleavage

Perfect {010}, imperfect {100}

Not Available

1.7 Mohs Hardness

6.5-7

Not Available

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Al 2O 3Ulrich Henn and Claudio C.

Tanzanite and Star Sapphire Chemical Formula

While comparing Tanzanite and Star 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 Star Sapphire chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

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Tanzanite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.