Opal and Pyrophyllite Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.65-2.90
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Gemstones (2009), Flexible Flexible fragments.
Cleavage
None
{001} Perfect
Mohs Hardness
5-6.5
Not Available
Chemical Composition
SiO2 · nH2O
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Pyrophyllite Chemical Formula
While comparing Opal and Pyrophyllite 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 Pyrophyllite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.