Pleonast and Sonolite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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3.82-4.00
  
Fracture
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Cleavage
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{???} Indistinct
  
Mohs Hardness
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5.5
  
Chemical Composition
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Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
  
Pleonast and Sonolite Chemical Formula
While comparing Pleonast and Sonolite 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 Pleonast and Sonolite chemical formula.
>- Chemical formula of Sonolite- Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
Pleonast and Sonolite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Pleonast and Sonolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pleonast and Sonolite Optical Properties during the identification of gemstone. Specific gravity of Pleonast is 3.82-4.00 whereas that of Sonolite is 3.82-4.00.