Cordierite and Rosasite Physical Properties

Cordierite

Rosasite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Effervesces in cold

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.664-4.2

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Splintery

1.6 Cleavage

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

Perfect on {100} and {010}

1.7 Mohs Hardness

7-7.54

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Not Available

Cordierite and Rosasite Chemical Formula

While comparing Cordierite and Rosasite 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 Rosasite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

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Cordierite Vs Rosasite

Cordierite and Rosasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Rosasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Rosasite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 4-4.2 whereas that of Rosasite is 4-4.2.