Schorl and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.18-3.22
2.57-2.66
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Subconchoidal, Conchoidal, Brittle
Cleavage
{1011} Indistinct
Fair on {100}, poor on {001} and {010}
Mohs Hardness
Not Available
7-7.5
Chemical Composition
Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Mg2Al4Si5O18
Schorl and Cordierite Chemical Formula
While comparing Schorl 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 Schorl and Cordierite chemical formula.
- Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Cordierite- Mg2Al4Si5O18
Schorl and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Schorl and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Schorl is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.