Apophyllite and Black Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.50
1.97-2.22
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009)
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on (001)
Not Available
Mohs Hardness
4.5-5
6-6.5
Chemical Composition
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
SiO 2 + H 2OUlrich Henn and Claudio C.
Apophyllite and Black Opal Chemical Formula
While comparing Apophyllite 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 Apophyllite and Black Opal chemical formula.
- Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Apophyllite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.