Schorl and Andalusite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.18-3.22
3.05-3.21
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Cleavage
{1011} Indistinct
Good on {110}, poor on {100}
Mohs Hardness
Not Available
7.5
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Schorl and Andalusite Chemical Formula
While comparing Schorl and Andalusite 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 Schorl and Andalusite chemical formula.
- Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Schorl and Andalusite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Schorl and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Schorl is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.