Pyrite and Almandine Physical Properties
Tenacity
Brittle
Not Available
Solubility
insoluble in water
Not Available
Durability
Not Available
Not Available
Specific Gravity
5.00-5.20
3.95-4.30
Fracture
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Indistinct on {001}; partings on {011} and {111}
none
Mohs Hardness
6-6.5
7-7.5
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Pyrite and Almandine Chemical Formula
While comparing Pyrite and Almandine 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 Pyrite and Almandine chemical formula.
- Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Pyrite and Almandine Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pyrite and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrite and Almandine Optical Properties during the identification of gemstone. Specific gravity of Pyrite is 3.95-4.30 whereas that of Almandine is 3.95-4.30.