Chlorastrolite and Dumortierite Physical Properties

Chlorastrolite

Dumortierite

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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

3.1-3.5

3.26-3.41

1.5 Fracture

Granular

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

5-6

7-8.5

1.8 Chemical Composition

Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)

AlAl₆O₃BSi₃O₁₈

Chlorastrolite and Dumortierite Chemical Formula

While comparing Chlorastrolite and Dumortierite 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 Chlorastrolite and Dumortierite chemical formula.

Chemical formula of Chlorastrolite- Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Chlorastrolite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chlorastrolite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chlorastrolite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Chlorastrolite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.