Humite and Apatite Physical Properties

Humite and Apatite Chemical Formula

While comparing Humite 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 Humite and Apatite chemical formula.

• Chemical formula of Humite- (Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony 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

Humite and Apatite Specific Gravity

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