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