Alabaster and Alunite Physical Properties

Alabaster and Alunite Chemical Formula

While comparing Alabaster 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 Alabaster and Alunite chemical formula.

• Chemical formula of Alabaster- CaSO 4 · 2H 2OWalter Schumann , Gemstones of the world (2001)
• Chemical formula of Alunite- KAl3(SO4)2(OH)6

Alabaster and Alunite Specific Gravity

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