Faustite and Pumpellyite Physical Properties

Faustite and Pumpellyite Chemical Formula

While comparing Faustite and Pumpellyite 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 Pumpellyite chemical formula.

• Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Pumpellyite- Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

Faustite and Pumpellyite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Pumpellyite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Pumpellyite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.20-3.30 whereas that of Pumpellyite is 3.20-3.30.