Staurolite and Emerald Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Hard
Specific Gravity
3.7-3.8
2.67-2.78
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Distinct on {010}
Imperfect on the [0001]
Mohs Hardness
7-7.5
7.5-8
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Be3Al2SiO6
Staurolite and Emerald Chemical Formula
While comparing Staurolite and Emerald 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 Emerald chemical formula.
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
- Chemical formula of Emerald- Be3Al2SiO6
Staurolite and Emerald Specific Gravity
Another important criteria for qualitative analysis of gemstones is Staurolite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.