Chalcedony and Staurolite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
3.7-3.8
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Absent
Distinct on {010}
Mohs Hardness
6.5-7
7-7.5
Chemical Composition
SiO2
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chalcedony and Staurolite Chemical Formula
While comparing Chalcedony 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 Chalcedony and Staurolite chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chalcedony and Staurolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.