Cordierite and Kyanite Physical Properties

Cordierite

Kyanite

Add ⊕

1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.53-3.65

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Splintery, Brittle, Metallic

1.6 Cleavage

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

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

7-7.54-7

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Not Available

Cordierite and Kyanite Chemical Formula

While comparing Cordierite and Kyanite 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 Kyanite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18

Compare Blue Gemstones

Cordierite Vs Rosasite

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.