Staurolite and Apophyllite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.7-3.8
2.30-2.50
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009)
Cleavage
Distinct on {010}
Perfect on (001)
Mohs Hardness
7-7.5
4.5-5
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Staurolite and Apophyllite Chemical Formula
While comparing Staurolite and Apophyllite 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 Staurolite and Apophyllite chemical formula.
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
- Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Staurolite and Apophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Staurolite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.