Black Opal and Labradorite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.69-2.72
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Cleavage
Not Available
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
(Na,Ca)1-2Si3-2O8
Black Opal and Labradorite Chemical Formula
While comparing Black Opal and Labradorite 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 Labradorite chemical formula.
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
Black Opal and Labradorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Black Opal and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.