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