Helenite and Beryllonite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
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Not Available
  
Durability
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Not Available
  
Specific Gravity
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2.79-2.87
  
Fracture
Not Available
  
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Cleavage
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{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
  
Mohs Hardness
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5.5-6
  
Chemical Composition
Not Available
  
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Helenite and Beryllonite Chemical Formula
While comparing Helenite and Beryllonite 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 Helenite and Beryllonite chemical formula.
>- Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Helenite and Beryllonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Helenite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Helenite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Helenite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.