Faustite and Erythrite Physical Properties
Tenacity
Not Available
Sectile
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.9
3.06
Fracture
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Cleavage
{???} Indistinct
Perfect on {010}; poor on {100} and { 1 02}.
Mohs Hardness
4.5
Not Available
Chemical Composition
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Co3(AsO4)2•8(H2O)
Faustite and Erythrite Chemical Formula
While comparing Faustite and Erythrite 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 Faustite and Erythrite chemical formula.
- Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Faustite and Erythrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Faustite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.06 whereas that of Erythrite is 3.06.