Opal and Microcline Physical Properties
Tenacity
BrittleWalter Schumann
  
Not Available
  
Solubility
hot salt water
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.98-2.25
  
2.55-2.63
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
  
Uneven, Uneven, Gems
  
Cleavage
None
  
{001} Perfect, {010} Good
  
Mohs Hardness
5-6.5
  
6-6.5
  
Chemical Composition
SiO2 · nH2O
  
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
  
Opal and Microcline Chemical Formula
While comparing Opal and Microcline 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 Opal and Microcline chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Microcline- KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Opal and Microcline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Microcline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Microcline Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.55-2.63 whereas that of Microcline is 2.55-2.63.