Cordierite and Milarite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.57-2.66
2.52-2.60
Fracture
Subconchoidal, Conchoidal, Brittle
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
Fair on {100}, poor on {001} and {010}
{0001} Imperfect, {1120} Imperfect
Mohs Hardness
7-7.5
5.5-6
Chemical Composition
Mg2Al4Si5O18
KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cordierite and Milarite Chemical Formula
While comparing Cordierite and Milarite 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 and Milarite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Milarite- KCa 2AlBe 2Si 12O 30 · 0.5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cordierite and Milarite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Milarite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Milarite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.52-2.60 whereas that of Milarite is 2.52-2.60.