Iolite and Agrellite Physical Properties

Iolite

Agrellite

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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

2.6-2.72.88

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

3,1

perfect [110]

1.7 Mohs Hardness

7-7.55.5

2 10

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

NaCa2Si4O10F

Iolite and Agrellite Chemical Formula

While comparing Iolite and Agrellite 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 Agrellite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Agrellite- NaCa2Si4O10F

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Iolite and Agrellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Agrellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Agrellite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 2.88 whereas that of Agrellite is 2.88.