Opal and Oligoclase Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.62-2.67
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
None
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
5-6.5
6-6.5
Chemical Composition
SiO2 · nH2O
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Oligoclase Chemical Formula
While comparing Opal 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 Opal and Oligoclase chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Opal and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.