Austinite and Star Sapphire Physical Properties

Austinite

Star Sapphire

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Easily soluble in cold dilute HCl

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.123.90-4.05

1 7.18

1.5 Fracture

Brittle, Uneven, Brittle, Uneven

Not Available

1.6 Cleavage

Good in two directions parallel to the prism faces {110}

Not Available

1.7 Mohs Hardness

4-4.5Not Available

2 10

1.8 Chemical Composition

CaZn(AsO4)(OH)

Al 2O 3Ulrich Henn and Claudio C.

Austinite and Star Sapphire Chemical Formula

While comparing Austinite 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 Austinite and Star Sapphire chemical formula.

Chemical formula of Austinite- CaZn(AsO4)(OH)
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Compare Green Gemstones

Austinite Vs Clintonite

Austinite Vs Cordierite

Austinite Vs Apophyllite KF

Austinite and Star Sapphire Specific Gravity

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