Topaz and Pyrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
2.65-2.90
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Gemstones (2009), Flexible Flexible fragments.
Cleavage
[001] Perfect
{001} Perfect
Mohs Hardness
8
Not Available
Chemical Composition
Al2SiO4(F,OH)2
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Topaz and Pyrophyllite Chemical Formula
While comparing Topaz 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 Topaz and Pyrophyllite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Topaz and Pyrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.