Black Opal and Fluorite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
slightly water soluble and in hot hydrochloric acid
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
3.00-3.25
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Not Available
Octahedral, perfect on {111}, parting on {011}
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
CaF2
Black Opal and Fluorite Chemical Formula
While comparing Black Opal and Fluorite 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 Black Opal and Fluorite chemical formula.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Fluorite- CaF2
Black Opal and Fluorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Black Opal and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.