Beryllonite and Staurolite Physical Properties
Specific Gravity
2.79-2.87
3.7-3.8
Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Distinct on {010}
Mohs Hardness
5.5-6
7-7.5
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Beryllonite and Staurolite Chemical Formula
While comparing Beryllonite and Staurolite 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 Beryllonite and Staurolite chemical formula.
- Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Beryllonite and Staurolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Beryllonite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Beryllonite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Beryllonite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.