Hollandite and Dumortierite Physical Properties

Hollandite

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

5.053.26-3.41

1 7.18

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

Distinct / Good, Prismatic

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

1.7 Mohs Hardness

4-67-8.5

2 10

1.8 Chemical Composition

Ba(Mn++++,Mn++)8O16

AlAl₆O₃BSi₃O₁₈

Hollandite and Dumortierite Chemical Formula

While comparing Hollandite 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 Hollandite and Dumortierite chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Hollandite and Dumortierite Specific Gravity

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