Tanzanite and Cordierite Physical Properties

Tanzanite

Cordierite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.35

2.57-2.66

1.5 Fracture

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Perfect {010}, imperfect {100}

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

1.7 Mohs Hardness

6.5-7

7-7.5

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

Mg2Al4Si5O18

Tanzanite and Cordierite Chemical Formula

While comparing Tanzanite and Cordierite 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 Tanzanite and Cordierite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Cordierite- Mg2Al4Si5O18

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Tanzanite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.