×

Cordierite
Cordierite

Ettringite
Ettringite



ADD
Compare
X
Cordierite
X
Ettringite

Cordierite and Ettringite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Partially soluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.661.77
Amber
1 7.18
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
Not Available
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
Perfect on {10 1 0}
1.7 Mohs Hardness
7-7.52-2.5
Amber
2 10
1.8 Chemical Composition
Mg2Al4Si5O18
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Cordierite and Ettringite Chemical Formula

While comparing Cordierite and Ettringite 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 Ettringite chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Cordierite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 1.77 whereas that of Ettringite is 1.77.