Williamsite and Apatite Physical Properties

Williamsite and Apatite Chemical Formula

While comparing Williamsite and Apatite 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 Williamsite and Apatite chemical formula.

• Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references

Williamsite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Williamsite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Williamsite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Williamsite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.