Milky quartz and Schorl Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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3.18-3.22
  
Fracture
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Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
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{1011} Indistinct
  
Mohs Hardness
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Chemical Composition
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Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  
Milky quartz and Schorl Chemical Formula
While comparing Milky quartz and Schorl 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 Milky quartz and Schorl chemical formula.
>- Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Milky quartz and Schorl Specific Gravity
Another important criteria for qualitative analysis of gemstones is Milky quartz and Schorl Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Milky quartz and Schorl Optical Properties during the identification of gemstone. Specific gravity of Milky quartz is 3.18-3.22 whereas that of Schorl is 3.18-3.22.