Childrenite and Black Opal Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.06-3.25
1.97-2.22
Fracture
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Poor/indistinct on {100}
Not Available
Mohs Hardness
4.5-5
6-6.5
Chemical Composition
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
SiO 2 + H 2OUlrich Henn and Claudio C.
Childrenite and Black Opal Chemical Formula
While comparing Childrenite 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 Childrenite and Black Opal chemical formula.
- Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
- Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Childrenite and Black Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Childrenite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Childrenite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Childrenite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.