Moonstone and Alunite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
2.56-2.60
2.6-2.9
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, Uneven
Cleavage
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
On {0001}, perfect
Mohs Hardness
6-6.5
3.5-4
Chemical Composition
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
KAl3(SO4)2(OH)6
Moonstone and Alunite Chemical Formula
While comparing Moonstone 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 Moonstone and Alunite chemical formula.
- Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
- Chemical formula of Alunite- KAl3(SO4)2(OH)6
Moonstone and Alunite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Moonstone and Alunite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Moonstone and Alunite Optical Properties during the identification of gemstone. Specific gravity of Moonstone is 2.6-2.9 whereas that of Alunite is 2.6-2.9.