Feldspar and Oligoclase Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.56-2.75
2.62-2.67
Fracture
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
two or three
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
Not Available
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Feldspar and Oligoclase Chemical Formula
While comparing Feldspar 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 Feldspar and Oligoclase chemical formula.
>- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Feldspar and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Feldspar and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Feldspar and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Feldspar is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.