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Fluorite and Black Opal Physical Properties


Black Opal and Fluorite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
slightly water soluble and in hot hydrochloric acid   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.00-3.25   
1.97-2.22   

Fracture
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references   
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
Octahedral, perfect on {111}, parting on {011}   
Not Available   

Mohs Hardness
4   
6-6.5   

Chemical Composition
CaF2   
SiO 2 + H 2OUlrich Henn and Claudio C.   

Optical Properties >>
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Fluorite and Black Opal Chemical Formula

While comparing Fluorite and Black 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 Fluorite and Black Opal chemical formula.

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Fluorite and Black Opal Specific Gravity

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

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