Hercynite and Dumortierite Physical Properties

Hercynite

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

4.393.26-3.41

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

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

1.6 Cleavage

{111} Indistinct, {111} Indistinct, {111} Indistinct

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

1.7 Mohs Hardness

7.5-87-8.5

2 10

1.8 Chemical Composition

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

AlAl₆O₃BSi₃O₁₈

Hercynite and Dumortierite Chemical Formula

While comparing Hercynite 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 Hercynite and Dumortierite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Hercynite and Dumortierite Specific Gravity

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