Ruby and Austinite Physical Properties

Ruby

Austinite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.054.12

1 7.18

1.5 Fracture

Conchoidal

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

No true cleavage

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

1.7 Mohs Hardness

94-4.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

CaZn(AsO4)(OH)

Ruby and Austinite Chemical Formula

While comparing Ruby and Austinite 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 Ruby and Austinite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Ruby and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Austinite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 4.12 whereas that of Austinite is 4.12.