Common Opal and Hardystonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.50
3.396-3.443
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Brittle, Metallic
Cleavage
Not Available
[001] good, [100] and [110] fair
Mohs Hardness
5.5-6.5
3-4
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Common Opal and Hardystonite Chemical Formula
While comparing Common Opal and Hardystonite 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 Common Opal and Hardystonite chemical formula.
- Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
- Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Common Opal and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Common Opal and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.