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Brookite and Boulder Opal Physical Properties


Boulder Opal and Brookite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.87-4.14   
1.98-2.25   

Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
Poor on {120}, in traces on {001}   
Not Available   

Mohs Hardness
5.5-6   
5-6.5   

Chemical Composition
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
SiO 2 + H 2OUlrich Henn and Claudio C.   

Optical Properties >>
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Brookite and Boulder Opal Chemical Formula

While comparing Brookite 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 Brookite and Boulder Opal chemical formula.

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Brookite and Boulder Opal Specific Gravity

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

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Red Gemstones


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