Tourmaline and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.85-3.35
3.2-3.4
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
Indistinct
[100] [001] perfect
Mohs Hardness
7-7.5
4-4.5
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Tourmaline and Purpurite Chemical Formula
While comparing Tourmaline 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 Tourmaline and Purpurite chemical formula.
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
- Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Tourmaline and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tourmaline and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.