Cordierite and Esperite Physical Properties

Cordierite

Esperite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.3 Solubility

Not Available

1.5 Durability

Not Available

1.7 Specific Gravity

2.57-2.664.28-4.42

1 7.18

1.9 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic

1.11 Cleavage

Fair on {100}, poor on {001} and {010}

Distinct on [010] and [100] poor on [101]

1.13 Mohs Hardness

7-7.55-5.5

2 10

1.15 Chemical Composition

Mg2Al4Si5O18

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Cordierite and Esperite Chemical Formula

While comparing Cordierite and Esperite 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 Esperite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

Cordierite Vs Riebeckite

Cordierite Vs Plumbogummite

Cordierite Vs Rosasite

Cordierite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.