Heliotrope and Howlite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.61
  
2.45-2.58
  
Fracture
Not Available
  
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Cleavage
Not Available
  
None
  
Mohs Hardness
6.5-7
  
3-3.5
  
Chemical Composition
Not Available
  
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Heliotrope and Howlite Chemical Formula
While comparing Heliotrope and Howlite 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 Heliotrope and Howlite chemical formula.
>- Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Heliotrope and Howlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Heliotrope and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Heliotrope and Howlite Optical Properties during the identification of gemstone. Specific gravity of Heliotrope is 2.45-2.58 whereas that of Howlite is 2.45-2.58.