Thomsonite and Alunite Physical Properties

Thomsonite and Alunite Chemical Formula

While comparing Thomsonite and Alunite 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 Thomsonite and Alunite chemical formula.

• Chemical formula of Thomsonite- NaCa 2Al 5Si 5O 20 · 6H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Thomsonite and Alunite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Thomsonite and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thomsonite and Alunite Optical Properties during the identification of gemstone. Specific gravity of Thomsonite is 2.6-2.9 whereas that of Alunite is 2.6-2.9.