Piemontite and Forsterite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
3.23-3.26
  
Fracture
Uneven, Splintery
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Cleavage
[001] good, [100] distinct
  
Perfect on {010} imperfect on {100}
  
Mohs Hardness
6-6.5
  
6.5-7
  
Chemical Composition
Not Available
  
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Piemontite and Forsterite Chemical Formula
While comparing Piemontite and Forsterite 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 Forsterite chemical formula.
>- Chemical formula of Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Piemontite and Forsterite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Piemontite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.