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Sellaite
Sellaite

Brucite
Brucite



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Sellaite
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Brucite

Sellaite and Brucite Physical Properties

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Physical Properties

Tenacity

Brittle
Sectile

Solubility

-
-

Durability

-
-

Specific Gravity

3.14-3.162.39
1 7.18
👆🏻

Fracture

Conchoidal
Irregular

Cleavage

Perfect on {010} and {110}
Perfect on {0001}

Mohs Hardness

5-5.52.5
2 10
👆🏻

Chemical Composition

MgF 2Ulrich Henn and Claudio C.
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Sellaite and Brucite Chemical Formula

While comparing Sellaite 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 Sellaite and Brucite chemical formula.

  • Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
  • Chemical formula of Brucite- Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Sellaite and Brucite Specific Gravity

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