Opal and Hemimorphite Physical Properties
Tenacity
BrittleWalter Schumann
Brittle
Solubility
hot salt water
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
3.30-3.50
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
None
Perfect on {110}, poor on {101}, {001} rare
Chemical Composition
SiO2 · nH2O
Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Hemimorphite Chemical Formula
While comparing Opal and Hemimorphite 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 Opal and Hemimorphite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Hemimorphite- Zn 4Si 2O 7(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Hemimorphite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Hemimorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Hemimorphite Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.30-3.50 whereas that of Hemimorphite is 3.30-3.50.