Prehnite and Andradite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.80-2.95
3.70-4.10
Fracture
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Distinct on [001]
none
Mohs Hardness
6-6.5
6.5-7
Chemical Composition
Ca2Al2Si3O12(OH)
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Prehnite and Andradite Chemical Formula
While comparing Prehnite and Andradite 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 Andradite chemical formula.
- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Prehnite and Andradite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Prehnite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prehnite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Prehnite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.