Piemontite and Caledonite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
5.6-5.76
  
Fracture
Uneven, Splintery
  
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)
  
Cleavage
[001] good, [100] distinct
  
[001] perfect; [100] distinct
  
Mohs Hardness
6-6.5
  
2.5-3
  
Chemical Composition
Not Available
  
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
  
Piemontite and Caledonite Chemical Formula
While comparing Piemontite and Caledonite 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 Piemontite and Caledonite chemical formula.
>- Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Piemontite and Caledonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Piemontite and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.