Cordierite Iolite and Herderite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.56-2.66
2.90-3.02
Fracture
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Not Available
Indistinct on {110}
Mohs Hardness
7-7.5
5-5.5
Chemical Composition
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Cordierite Iolite and Herderite Chemical Formula
While comparing Cordierite Iolite and Herderite 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 Cordierite Iolite and Herderite chemical formula.
- Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Cordierite Iolite and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite Iolite and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite Iolite and Herderite Optical Properties during the identification of gemstone. Specific gravity of Cordierite Iolite is 2.90-3.02 whereas that of Herderite is 2.90-3.02.