Carnelian and Afghanite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.58-2.64
2.55-2.65
Fracture
Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
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)
Carnelian and Afghanite Chemical Formula
While comparing Carnelian 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 Carnelian and Afghanite chemical formula.
- Chemical formula of Carnelian- 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)
Carnelian and Afghanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Carnelian and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Carnelian and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Carnelian is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.