Rosasite and Staurolite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Effervesces in cold
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
4-4.2
  
3.7-3.8
  
Fracture
Splintery
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
Perfect on {100} and {010}
  
Distinct on {010}
  
Mohs Hardness
4
  
7-7.5
  
Chemical Composition
Not Available
  
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
  
Rosasite and Staurolite Chemical Formula
While comparing Rosasite 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 Rosasite and Staurolite chemical formula.
>- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Rosasite and Staurolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rosasite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rosasite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Rosasite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.