Afghanite and Riebeckite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.65
3.28-3.44
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Uneven, Splintery, Brittle
Cleavage
Perfect {10 1 0}
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
5.5-6
5.0-6.0
Chemical Composition
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
Not Available
Afghanite and Riebeckite Chemical Formula
While comparing Afghanite and Riebeckite 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 Riebeckite 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)
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Afghanite and Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Afghanite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.