Cordierite and Londonite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.57-2.66
3.34
Fracture
Subconchoidal, Conchoidal, Brittle
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Fair on {100}, poor on {001} and {010}
None
Mohs Hardness
7-7.5
Not Available
Chemical Composition
Mg2Al4Si5O18
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Cordierite and Londonite Chemical Formula
While comparing Cordierite and Londonite 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 Londonite chemical formula.
- Chemical formula of Cordierite- Mg2Al4Si5O18
- Chemical formula of Londonite- (Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
Cordierite and Londonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Cordierite and Londonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Londonite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.34 whereas that of Londonite is 3.34.