Heliotrope and Andalusite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.61
  
3.05-3.21
  
Fracture
Not Available
  
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
Not Available
  
Good on {110}, poor on {100}
  
Mohs Hardness
6.5-7
  
7.5
  
Chemical Composition
Not Available
  
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
  
Heliotrope and Andalusite Chemical Formula
While comparing Heliotrope and Andalusite 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 Andalusite chemical formula.
>- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Heliotrope and Andalusite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Heliotrope and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Heliotrope and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Heliotrope is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.