Tanzanite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Hard
Not Available
Specific Gravity
3.35
3.2-3.4
Fracture
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Perfect {010}, imperfect {100}
[100] [001] perfect
Mohs Hardness
6.5-7
4-4.5
Chemical Composition
Ca2Al3(SiO4)3(OH)
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Tanzanite and Purpurite Chemical Formula
While comparing Tanzanite 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 Tanzanite and Purpurite chemical formula.
- Chemical formula of Tanzanite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Tanzanite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tanzanite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.