Afghanite and Amethyst Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
insoluble in common solvents
Durability
Not Available
Not Available
Specific Gravity
2.55-2.65
2.65
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect {10 1 0}
Indiscernible
Chemical Composition
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
SiO2
Afghanite and Amethyst Chemical Formula
While comparing Afghanite 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 Afghanite and Amethyst chemical formula.
- Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
- Chemical formula of Amethyst- SiO2
Afghanite and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Afghanite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 2.65 whereas that of Amethyst is 2.65.