Polyhalite and Cordierite Iolite Physical Properties

Polyhalite

Cordierite Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.782.56-2.66

1 7.18

1.5 Fracture

Conchoidal, Brittle

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

Not Available

1.7 Mohs Hardness

3.57-7.5

2 10

1.8 Chemical Composition

Not Available

Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Polyhalite and Cordierite Iolite Chemical Formula

While comparing Polyhalite and Cordierite Iolite 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 Polyhalite and Cordierite Iolite chemical formula.

Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.

Compare Red Gemstones

Polyhalite Vs Heliotrope

Polyhalite Vs Vanadinite

Polyhalite Vs Jacinth

Polyhalite and Cordierite Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Cordierite Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Cordierite Iolite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.56-2.66 whereas that of Cordierite Iolite is 2.56-2.66.