Phenakite and Iolite Physical Properties

Phenakite

Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.982.6-2.7

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle

Not Available

1.6 Cleavage

Distinct on {11 2 0}, imperfect on {10 1 1}

3,1

1.7 Mohs Hardness

7.5-87-7.5

2 10

1.8 Chemical Composition

Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Mg₂Al₄Si₅O₁₈

Phenakite and Iolite Chemical Formula

While comparing Phenakite and 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 Phenakite and Iolite chemical formula.

Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Phenakite and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phenakite and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Iolite Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 2.6-2.7 whereas that of Iolite is 2.6-2.7.