Rossmanite and Amethyst Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
insoluble in common solvents
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3
  
2.65
  
Fracture
Brittle, Metallic
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
None
  
Indiscernible
  
Mohs Hardness
Not Available
  
7
  
Chemical Composition
◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  
SiO2
  
Rossmanite and Amethyst Chemical Formula
While comparing Rossmanite and Amethyst 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 Rossmanite and Amethyst chemical formula.
- Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Amethyst- SiO2
Rossmanite and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rossmanite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 2.65 whereas that of Amethyst is 2.65.