Allanite and Colemanite Physical Properties

Allanite and Colemanite Chemical Formula

While comparing Allanite and Colemanite 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 Allanite and Colemanite chemical formula.

• Chemical formula of Allanite- Ca(Ce,La,Y,Ca)Al2(Fe,Al)Si3O12(OH)
• Chemical formula of Colemanite- Ca 2B 6O 11 · 5H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Allanite and Colemanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Allanite and Colemanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Allanite and Colemanite Optical Properties during the identification of gemstone. Specific gravity of Allanite is 2.40-2.42 whereas that of Colemanite is 2.40-2.42.