Hercynite and Andalusite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.39
3.05-3.21
Fracture
ConchoidalGemdat.org, Uneven
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Good on {110}, poor on {100}
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Hercynite and Andalusite Chemical Formula
While comparing Hercynite 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 Hercynite and Andalusite chemical formula.
- Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Hercynite and Andalusite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Hercynite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.