Phenakite and Spodumene Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
insoluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-2.98
  
3.15-3.21
  
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle
  
Uneven, Subconchoidal, Gemstones (2009)
  
Cleavage
Distinct on {11 2 0}, imperfect on {10 1 1}
  
Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°
  
Mohs Hardness
7.5-8
  
6-7
  
Chemical Composition
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
LiAlSi2O6
  
Phenakite and Spodumene Chemical Formula
While comparing Phenakite and Spodumene 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 Phenakite and Spodumene chemical formula.
- Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Spodumene- LiAlSi2O6
Phenakite and Spodumene Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phenakite and Spodumene Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Spodumene Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 3.15-3.21 whereas that of Spodumene is 3.15-3.21.