Realgar and Black Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.56
1.97-2.22
Fracture
(e.g. graphite).
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
{010} Good
Not Available
Mohs Hardness
Not Available
6-6.5
Chemical Composition
AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 + H 2OUlrich Henn and Claudio C.
Realgar and Black Opal Chemical Formula
While comparing Realgar 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 Realgar and Black Opal chemical formula.
- Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Realgar and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Realgar and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Realgar and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Realgar is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.