Staurolite and Labradorite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.7-3.8
2.69-2.72
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Cleavage
Distinct on {010}
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Mohs Hardness
7-7.5
6-6.5
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
(Na,Ca)1-2Si3-2O8
Staurolite and Labradorite Chemical Formula
While comparing Staurolite and Labradorite 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 Labradorite chemical formula.
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
- Chemical formula of Labradorite- (Na,Ca)1-2Si3-2O8
Staurolite and Labradorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Staurolite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.