Rubellite and Siderite Physical Properties
Specific Gravity
3.01-3.06
3.83-3.89
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Indiscernible
Perfect on {01 1 1}
Mohs Hardness
7-7.5
3.5-4.5
Chemical Composition
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Rubellite and Siderite Chemical Formula
While comparing Rubellite 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 Rubellite and Siderite chemical formula.
- Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
- Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Rubellite and Siderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rubellite and Siderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Siderite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.83-3.89 whereas that of Siderite is 3.83-3.89.