Tourmaline and Weloganite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
2.85-3.35
  
3.20-3.22
  
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Conchoidal, Brittle
  
Cleavage
Indistinct
  
Perfect on pseudo {0001}
  
Mohs Hardness
7-7.5
  
3
  
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
  
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Tourmaline and Weloganite Chemical Formula
While comparing Tourmaline and Weloganite 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 Weloganite 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.
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Tourmaline and Weloganite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tourmaline and Weloganite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Weloganite Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 3.20-3.22 whereas that of Weloganite is 3.20-3.22.