Dumortierite and Esperite Physical Properties

Dumortierite

Esperite

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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

3.26-3.414.28-4.42

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

Distinct on [010] and [100] poor on [101]

1.7 Mohs Hardness

7-8.55-5.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

Dumortierite and Esperite Chemical Formula

While comparing Dumortierite and Esperite 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 Dumortierite and Esperite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)

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Dumortierite and Esperite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Esperite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 4.28-4.42 whereas that of Esperite is 4.28-4.42.