Andalusite and Riebeckite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
3.28-3.44
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Uneven, Splintery, Brittle
Cleavage
Good on {110}, poor on {100}
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
7.5
5.0-6.0
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Not Available
Andalusite and Riebeckite Chemical Formula
While comparing Andalusite 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 Andalusite and Riebeckite chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
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Andalusite and Riebeckite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.