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Brucite
Brucite

Mottramite
Mottramite



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Brucite
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Mottramite

Brucite and Mottramite Physical Properties

Physical Properties

Tenacity

Sectile
Brittle

Solubility

-
Soluble

Durability

-
-

Specific Gravity

2.395.9
1 7.18
👆🏻

Fracture

Irregular
Sub-Conchoidal

Cleavage

Perfect on {0001}
None observed

Mohs Hardness

2.53
2 10
👆🏻

Chemical Composition

Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
PbCu(VO4)(OH)

Brucite and Mottramite Chemical Formula

While comparing Brucite and Mottramite 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 Brucite and Mottramite chemical formula.

  • Chemical formula of Brucite- Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Mottramite- PbCu(VO4)(OH)

Brucite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brucite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brucite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Brucite is 5.9 whereas that of Mottramite is 5.9.