Dumortierite and Hardystonite Physical Properties

Dumortierite

Hardystonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.26-3.413.396-3.443

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

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

[001] good, [100] and [110] fair

1.7 Mohs Hardness

7-8.53-4

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

Dumortierite and Hardystonite Chemical Formula

While comparing Dumortierite and Hardystonite 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 Hardystonite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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Dumortierite and Hardystonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dumortierite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.