Oligoclase and Gahnite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.62-2.67
4.00-4.62
Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Conchoidal, Uneven
Cleavage
From the Greek, oligos and kasein, little cleavage.
Indistinct parting on [111]
Mohs Hardness
6-6.5
7.5-8
Chemical Composition
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Oligoclase and Gahnite Chemical Formula
While comparing Oligoclase and Gahnite 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 Oligoclase and Gahnite chemical formula.
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Oligoclase and Gahnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Oligoclase and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Oligoclase and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Oligoclase is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.