Aragonite and Prehnite Physical Properties
Solubility
Dilute acid
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.93-2.96
2.80-2.95
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
Distinct on {010}, imperfect {110} and {011}
Distinct on [001]
Mohs Hardness
3.5-4
6-6.5
Chemical Composition
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca2Al2Si3O12(OH)
Aragonite and Prehnite Chemical Formula
While comparing Aragonite and Prehnite 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 Aragonite and Prehnite chemical formula.
- Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
Aragonite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Aragonite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Aragonite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Aragonite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.