Andradite and Purpurite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.70-4.10
3.2-3.4
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
none
[100] [001] perfect
Mohs Hardness
6.5-7
4-4.5
Chemical Composition
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Andradite and Purpurite Chemical Formula
While comparing Andradite and Purpurite 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 Andradite and Purpurite chemical formula.
- Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Andradite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andradite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Andradite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.