Faustite and Willemite Physical Properties

Faustite and Willemite Chemical Formula

While comparing Faustite and Willemite 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 Willemite 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 Willemite- Zn 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Faustite and Willemite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Willemite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Willemite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 3.89-4.18 whereas that of Willemite is 3.89-4.18.