Ruby and Crystal Opal Physical Properties

Ruby

Crystal Opal

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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

3.97-4.051.97-2.22

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

Not Available

1.7 Mohs Hardness

95.5-6.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

SiO 2 + H 2OUlrich Henn and Claudio C.

Ruby and Crystal Opal Chemical Formula

While comparing Ruby and Crystal Opal 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 Crystal Opal chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Ruby and Crystal Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Crystal Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Crystal Opal Optical Properties during the identification of gemstone. Specific gravity of Ruby is 1.97-2.22 whereas that of Crystal Opal is 1.97-2.22.