Milky quartz and Herderite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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2.90-3.02
  
Fracture
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Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
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Indistinct on {110}
  
Mohs Hardness
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5-5.5
  
Chemical Composition
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CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
Milky quartz and Herderite Chemical Formula
While comparing Milky quartz and Herderite 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 Herderite chemical formula.
>- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Milky quartz and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Milky quartz and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Milky quartz and Herderite Optical Properties during the identification of gemstone. Specific gravity of Milky quartz is 2.90-3.02 whereas that of Herderite is 2.90-3.02.