Iolite and Vivianite Physical Properties

Iolite

Vivianite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.72.64-2.70

1 7.18

1.5 Fracture

Not Available

(e.g. graphite).

1.6 Cleavage

3,1

{010} Perfect

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Iolite and Vivianite Chemical Formula

While comparing Iolite and Vivianite 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 Vivianite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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Iolite and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.