Chalcedony and Oligoclase Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
2.62-2.67
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
Absent
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
6.5-7
6-6.5
Chemical Composition
SiO2
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chalcedony and Oligoclase Chemical Formula
While comparing Chalcedony 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 Chalcedony and Oligoclase chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Chalcedony and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.