Andalusite and Siderite Physical Properties
Specific Gravity
3.05-3.21
3.83-3.89
Fracture
Uneven, Subconchoidal, Splintery
Uneven, Conchoidal
Cleavage
Good on {110}, poor on {100}
Perfect on {01 1 1}
Mohs Hardness
7.5
3.5-4.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Andalusite and Siderite Chemical Formula
While comparing Andalusite and Siderite 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 Siderite chemical formula.
- Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
- Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Andalusite and Siderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Andalusite and Siderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Siderite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.83-3.89 whereas that of Siderite is 3.83-3.89.