Cordierite and Phenakite Physical Properties

Cordierite

Phenakite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.662.90-2.98

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

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

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

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

1.7 Mohs Hardness

7-7.57.5-8

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Phenakite Chemical Formula

While comparing Cordierite and Phenakite 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 Cordierite and Phenakite chemical formula.

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

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Cordierite and Phenakite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Phenakite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Phenakite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.90-2.98 whereas that of Phenakite is 2.90-2.98.