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