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Boulder Opal and Sapphire Physical Properties


Sapphire and Boulder Opal Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
insoluble   

Durability
Not Available   
Not Available   

Specific Gravity
1.98-2.25   
3.95-4.03   

Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   
Uneven, Uneven, Gems, Sixth Edition (2006)   

Cleavage
Not Available   
None, but may exhibit parting   

Mohs Hardness
5-6.5   
9   

Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.   
Al 2 O 3   

Optical Properties >>
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Boulder Opal and Sapphire Chemical Formula

While comparing Boulder Opal and Sapphire 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 Boulder Opal and Sapphire chemical formula.

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Boulder Opal and Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Sapphire Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 3.95-4.03 whereas that of Sapphire is 3.95-4.03.

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