Piemontite and Moldavite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
2.32-2.38
  
Fracture
Uneven, Splintery
  
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
[001] good, [100] distinct
  
Not Available
  
Mohs Hardness
6-6.5
  
5.5
  
Chemical Composition
Not Available
  
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
  
Piemontite and Moldavite Chemical Formula
While comparing Piemontite and Moldavite 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 Moldavite chemical formula.
>- Chemical formula of Moldavite- SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
Piemontite and Moldavite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Piemontite and Moldavite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Moldavite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 2.32-2.38 whereas that of Moldavite is 2.32-2.38.