Prehnite and Oligoclase Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.80-2.95
2.62-2.67
Fracture
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Cleavage
Distinct on [001]
From the Greek, oligos and kasein, little cleavage.
Mohs Hardness
6-6.5
6-6.5
Chemical Composition
Ca2Al2Si3O12(OH)
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Prehnite and Oligoclase Chemical Formula
While comparing Prehnite 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 Prehnite and Oligoclase chemical formula.
- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
- Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Prehnite and Oligoclase Specific Gravity
Another important criteria for qualitative analysis of gemstones is Prehnite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prehnite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Prehnite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.