Mottramite and Tourmaline Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
5.9
  
2.85-3.35
  
Fracture
Sub-Conchoidal, Brittle, Metallic
  
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
None observed
  
Indistinct
  
Mohs Hardness
3
  
7-7.5
  
Chemical Composition
Not Available
  
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
  
Mottramite and Tourmaline Chemical Formula
While comparing Mottramite 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 Mottramite and Tourmaline 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.
Mottramite and Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Mottramite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mottramite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Mottramite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.