Riebeckite and Norbergite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.28-3.44
3.177
Fracture
Uneven, Splintery, Brittle
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
{???} Distinct
Mohs Hardness
5.0-6.0
6-6.5
Chemical Composition
Not Available
Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)
Riebeckite and Norbergite Chemical Formula
While comparing Riebeckite and Norbergite 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 Riebeckite and Norbergite chemical formula.
>- Chemical formula of Norbergite- Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)
Riebeckite and Norbergite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Riebeckite and Norbergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Norbergite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 3.177 whereas that of Norbergite is 3.177.