Ruby and Topaz Physical Properties

Ruby

Topaz

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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

3.97-4.053.49-3.57

1 7.18

1.5 Fracture

Conchoidal

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

No true cleavage

[001] Perfect

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al ₂ O ₃

Al₂SiO₄(F,OH)₂

Ruby and Topaz Chemical Formula

While comparing Ruby and Topaz 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 Topaz chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Ruby and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Topaz Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.49-3.57 whereas that of Topaz is 3.49-3.57.