Sard and Ruby Physical Properties

Sard

Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.58-2.63

3.97-4.05

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal

1.6 Cleavage

Not Available

No true cleavage

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO 2Ulrich Henn and Claudio C.

Al ₂ O ₃

Sard and Ruby Chemical Formula

While comparing Sard and Ruby 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 Sard and Ruby chemical formula.

Chemical formula of Sard- SiO 2Ulrich Henn and Claudio C.
Chemical formula of Ruby- Al ₂ O ₃

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Sard and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sard and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sard and Ruby Optical Properties during the identification of gemstone. Specific gravity of Sard is 3.97-4.05 whereas that of Ruby is 3.97-4.05.