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Hollandite
Hollandite

Brucite
Brucite



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Hollandite
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Hollandite and Brucite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Sectile
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
5.05
2.39
1.5 Fracture
Brittle, Metallic
Irregular
1.6 Cleavage
Distinct / Good, Prismatic
Perfect on {0001}
1.7 Mohs Hardness
4-6
2.5
1.8 Chemical Composition
Ba(Mn++++,Mn++)8O16
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Hollandite and Brucite Chemical Formula

While comparing Hollandite and Brucite 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 Brucite chemical formula.

  • Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
  • Chemical formula of Brucite- Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Hollandite and Brucite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Brucite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Brucite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.39 whereas that of Brucite is 2.39.