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