Star Sapphire and Tanzanite Physical Properties

Star Sapphire

Tanzanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.90-4.05

3.35

1.5 Fracture

Not Available

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

1.6 Cleavage

Not Available

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

Not Available

6.5-7

1.8 Chemical Composition

Al 2O 3Ulrich Henn and Claudio C.

Ca₂Al₃(SiO₄)₃(OH)

Star Sapphire and Tanzanite Chemical Formula

While comparing Star Sapphire and Tanzanite 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 Star Sapphire and Tanzanite chemical formula.

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

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Star Sapphire and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Star Sapphire and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 3.35 whereas that of Tanzanite is 3.35.