Spinel and Oligoclase Physical Properties
Physical Properties
Tenacity
Not Available
Not Available
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
2.62-2.67
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
None, but may exhibit slight parting
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
8
6-6.5
Chemical Composition
MgAl2O4
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Spinel and Oligoclase Chemical Formula
While comparing Spinel 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 Spinel and Oligoclase chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Spinel and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Spinel is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.
