Cordierite and Faustite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.57-2.66
2.9
Fracture
Subconchoidal, Conchoidal, Brittle
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
Cleavage
Fair on {100}, poor on {001} and {010}
{???} Indistinct
Chemical Composition
Mg2Al4Si5O18
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cordierite and Faustite Chemical Formula
While comparing Cordierite and Faustite 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 Cordierite and Faustite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cordierite and Faustite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.9 whereas that of Faustite is 2.9.