Turquoise and Herderite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.30-2.90
  
2.90-3.02
  
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
Good to perfect_usually N/A
  
Indistinct on {110}
  
Mohs Hardness
5-6
  
5-5.5
  
Chemical Composition
CuAl6(PO4)4(OH)8 • 4H2O
  
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
Turquoise and Herderite Chemical Formula
While comparing Turquoise and Herderite 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 Turquoise and Herderite chemical formula.
- Chemical formula of Turquoise- CuAl6(PO4)4(OH)8 • 4H2O
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Turquoise and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Turquoise and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Herderite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 2.90-3.02 whereas that of Herderite is 2.90-3.02.