Almandine and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.95-4.30
2.57-2.66
Fracture
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Subconchoidal, Conchoidal, Brittle
Cleavage
none
Fair on {100}, poor on {001} and {010}
Mohs Hardness
7-7.5
7-7.5
Chemical Composition
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Mg2Al4Si5O18
Almandine and Cordierite Chemical Formula
While comparing Almandine and Cordierite 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 Almandine and Cordierite chemical formula.
- Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
- Chemical formula of Cordierite- Mg2Al4Si5O18
Almandine and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Almandine and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.