Willemite and Esperite Physical Properties

Willemite and Esperite Chemical Formula

While comparing Willemite and Esperite 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 Willemite and Esperite chemical formula.

• Chemical formula of Willemite- Zn 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Willemite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Willemite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.