Achroite and Riebeckite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.40
3.28-3.44
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Uneven, Splintery, Brittle
Cleavage
Not Available
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
7-7.5
5.0-6.0
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Not Available
Achroite and Riebeckite Chemical Formula
While comparing Achroite 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 Achroite and Riebeckite chemical formula.
- Chemical formula of Achroite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
>
Achroite and Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Achroite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Achroite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Achroite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.