Galena and Demantoid Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
6.23
  
3.77-3.95
  
Fracture
Subconchoidal, Brittle, Metallic
  
Not Available
  
Cleavage
Cubic perfect on [001], parting on [111]
  
Not Available
  
Mohs Hardness
2.5-2.75
  
6.5
  
Chemical Composition
PbS
  
Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
  
Galena and Demantoid Chemical Formula
While comparing Galena and Demantoid 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 Galena and Demantoid chemical formula.
- Chemical formula of Galena- PbS
- Chemical formula of Demantoid- Ca 3Fe 2(SiO 4) 3Ulrich Henn and Claudio C.
Galena and Demantoid Specific Gravity
Another important criteria for qualitative analysis of gemstones is Galena and Demantoid Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Demantoid Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.77-3.95 whereas that of Demantoid is 3.77-3.95.