Chalcedony and Afghanite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
2.55-2.65
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Cleavage
Absent
Perfect {10 1 0}
Mohs Hardness
6.5-7
5.5-6
Chemical Composition
SiO2
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Chalcedony and Afghanite Chemical Formula
While comparing Chalcedony 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 Chalcedony and Afghanite chemical formula.
- Chemical formula of Chalcedony- 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)
Chalcedony and Afghanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.