Ruby and Boulder Opal Physical Properties

Ruby

Boulder 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

3.97-4.051.98-2.25

1 7.18

1.5 Fracture

Conchoidal

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

1.6 Cleavage

No true cleavage

Not Available

1.7 Mohs Hardness

95-6.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

SiO 2 + H 2OUlrich Henn and Claudio C.

Ruby and Boulder Opal Chemical Formula

While comparing Ruby and Boulder 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 Boulder Opal chemical formula.

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

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Ruby and Boulder Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Boulder Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Boulder Opal Optical Properties during the identification of gemstone. Specific gravity of Ruby is 1.98-2.25 whereas that of Boulder Opal is 1.98-2.25.