Apophyllite and Fayalite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.50
4.392
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Perfect on (001)
{010} moderate, {100} imperfect
Mohs Hardness
4.5-5
6.5-7
Chemical Composition
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Apophyllite and Fayalite Chemical Formula
While comparing Apophyllite and Fayalite 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 Apophyllite and Fayalite chemical formula.
- Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Apophyllite and Fayalite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 4.392 whereas that of Fayalite is 4.392.