Zoisite and Star Sapphire Physical Properties

Zoisite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.503.90-4.05

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even

Not Available

1.6 Cleavage

Perfect {010} imperfect {100}

Not Available

1.7 Mohs Hardness

6-7Not Available

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Al 2O 3Ulrich Henn and Claudio C.

Zoisite and Star Sapphire Chemical Formula

While comparing Zoisite 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 Zoisite and Star Sapphire chemical formula.

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

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Zoisite and Star Sapphire Specific Gravity

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