Staurolite and Diaspore Physical Properties
Tenacity
Brittle
Very brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.7-3.8
3.30-3.40
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Brittle, Conchoidal
Cleavage
Distinct on {010}
{010} perfect, {110} distinct, {100} in traces
Mohs Hardness
7-7.5
6.5-7
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Staurolite and Diaspore Chemical Formula
While comparing Staurolite and Diaspore 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 Diaspore chemical formula.
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Staurolite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Staurolite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.