Erythrite and Andradite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.06
3.70-4.10
Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
none
Mohs Hardness
Not Available
6.5-7
Chemical Composition
Co3(AsO4)2•8(H2O)
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Erythrite and Andradite Chemical Formula
While comparing Erythrite 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 Erythrite and Andradite chemical formula.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Erythrite and Andradite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Erythrite and Andradite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Andradite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 3.70-4.10 whereas that of Andradite is 3.70-4.10.