Chalcedony and Andalusite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.70
3.05-3.21
Fracture
Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Cleavage
Absent
Good on {110}, poor on {100}
Chemical Composition
SiO2
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chalcedony and Andalusite Chemical Formula
While comparing Chalcedony 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 Chalcedony and Andalusite chemical formula.
- Chemical formula of Chalcedony- SiO2
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chalcedony and Andalusite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Chalcedony and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chalcedony and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Chalcedony is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.