Cordierite and Emerald Physical Properties

Cordierite

Emerald

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

2.57-2.66

2.67-2.78

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

Imperfect on the [0001]

1.7 Mohs Hardness

7-7.5

7.5-8

1.8 Chemical Composition

Mg2Al4Si5O18

Be₃Al₂SiO₆

Cordierite and Emerald Chemical Formula

While comparing Cordierite and Emerald 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 Emerald chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Emerald- Be₃Al₂SiO₆

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Cordierite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.