Andalusite and Diaspore Physical Properties
Tenacity
Not Available
Very brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
3.30-3.40
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Conchoidal, Brittle, Conchoidal
Cleavage
Good on {110}, poor on {100}
{010} perfect, {110} distinct, {100} in traces
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Andalusite and Diaspore Chemical Formula
While comparing Andalusite and Diaspore 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 Diaspore chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Andalusite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.