Andalusite and Amethyst Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
insoluble in common solvents
Durability
Not Available
Not Available
Specific Gravity
3.05-3.21
2.65
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Good on {110}, poor on {100}
Indiscernible
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO2
Andalusite and Amethyst Chemical Formula
While comparing Andalusite and Amethyst 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 Amethyst chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Amethyst- SiO2
Andalusite and Amethyst Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 2.65 whereas that of Amethyst is 2.65.