Ruby and Zoisite Physical Properties

Ruby

Zoisite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.20-3.50

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

Perfect {010} imperfect {100}

1.7 Mohs Hardness

96-7

2 10

1.8 Chemical Composition

Al ₂ O ₃

Ca₂Al₃(SiO₄)₃(OH)

Ruby and Zoisite Chemical Formula

While comparing Ruby and Zoisite 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 Zoisite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)

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Ruby and Zoisite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Zoisite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Zoisite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.20-3.50 whereas that of Zoisite is 3.20-3.50.