Piemontite and Omphacite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
3.16-3.43
  
Fracture
Uneven, Splintery
  
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
[001] good, [100] distinct
  
{110} Good, {110} Good
  
Mohs Hardness
6-6.5
  
5-6
  
Chemical Composition
Not Available
  
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
  
Piemontite and Omphacite Chemical Formula
While comparing Piemontite and Omphacite 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 Omphacite chemical formula.
>- Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
Piemontite and Omphacite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Piemontite and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.