Dumortierite quartz and Montebrasite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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2.98-3.10
  
Fracture
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Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
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{100} Perfect, {110} Good, {011} Distinct
  
Mohs Hardness
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5.5-6
  
Chemical Composition
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LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
  
Dumortierite quartz and Montebrasite Chemical Formula
While comparing Dumortierite quartz and Montebrasite 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 Dumortierite quartz and Montebrasite chemical formula.
>- Chemical formula of Montebrasite- LiAl(PO 4)(OH,F)Walter Schumann , Gemstones of the world (2001) More from other references
Dumortierite quartz and Montebrasite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite quartz and Montebrasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite quartz and Montebrasite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite quartz is 2.98-3.10 whereas that of Montebrasite is 2.98-3.10.