Iolite and Ettringite Physical Properties

Iolite

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.71.77

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

3,1

Perfect on {10 1 0}

1.7 Mohs Hardness

7-7.52-2.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Iolite and Ettringite Chemical Formula

While comparing Iolite and Ettringite 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 Ettringite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Iolite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 1.77 whereas that of Ettringite is 1.77.