Heliodor and Londonite Physical Properties
Tenacity
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Solubility
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Durability
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Specific Gravity
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3.34
  
Fracture
Not Available
  
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
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None
  
Mohs Hardness
7.5
  
Not Available
  
Chemical Composition
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(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
  
Heliodor and Londonite Chemical Formula
While comparing Heliodor and Londonite 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 Heliodor and Londonite chemical formula.
>- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Heliodor and Londonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Heliodor and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Heliodor and Londonite Optical Properties during the identification of gemstone. Specific gravity of Heliodor is 3.34 whereas that of Londonite is 3.34.