Sapphire and Oligoclase Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
insoluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.95-4.03
  
2.62-2.67
  
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
  
Cleavage
None, but may exhibit parting
  
From the Greek, oligos and kasein, little cleavage.
  
Mohs Hardness
9
  
6-6.5
  
Chemical Composition
Al 2 O 3
  
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Sapphire and Oligoclase Chemical Formula
While comparing Sapphire and Oligoclase 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 Sapphire and Oligoclase chemical formula.
- Chemical formula of Sapphire- Al 2 O 3
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Sapphire and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sapphire and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sapphire and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Sapphire is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.
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