Iolite and Creedite Physical Properties

Iolite

Creedite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.70

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

3,1

Perfect on {100}

1.7 Mohs Hardness

7-7.54.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

Iolite and Creedite Chemical Formula

While comparing Iolite and Creedite 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 Iolite and Creedite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

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Iolite and Creedite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Creedite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Creedite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.70 whereas that of Creedite is 2.70.