Apophyllite and Amethyst Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
insoluble in common solvents
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.30-2.50
  
2.65
  
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009)
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Cleavage
Perfect on (001)
  
Indiscernible
  
Mohs Hardness
4.5-5
  
7
  
Chemical Composition
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
  
SiO2
  
Apophyllite and Amethyst Chemical Formula
While comparing Apophyllite 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 Apophyllite and Amethyst chemical formula.
- Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
- Chemical formula of Amethyst- SiO2
Apophyllite and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apophyllite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apophyllite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Apophyllite is 2.65 whereas that of Amethyst is 2.65.