Biotite and Moonstone Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.7-3.3
2.56-2.60
Fracture
Uneven, Even, Yellow, White
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect on the {001}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mohs Hardness
2.5-3.0
6-6.5
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Biotite and Moonstone Chemical Formula
While comparing Biotite and Moonstone 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 Biotite and Moonstone chemical formula.
- Chemical formula of Biotite- K(Mg,Fe++)3[AlSi3O10(OH,F)2
- Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al1-2Si3-2O8 Orthoclase Feldspar : KAlSi3O8
Biotite and Moonstone Specific Gravity
Another important criteria for qualitative analysis of gemstones is Biotite and Moonstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Biotite and Moonstone Optical Properties during the identification of gemstone. Specific gravity of Biotite is 2.56-2.60 whereas that of Moonstone is 2.56-2.60.