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