Gibbsite and Brucite Physical Properties

Gibbsite

Brucite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.352.39

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Irregular

1.6 Cleavage

{001} Perfect

Perfect on {0001}

1.7 Mohs Hardness

2.5-32.5

2 10

1.8 Chemical Composition

Al(OH)3

Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Gibbsite and Brucite Chemical Formula

While comparing Gibbsite 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 Gibbsite and Brucite chemical formula.

Chemical formula of Gibbsite- Al(OH)3
Chemical formula of Brucite- Mg(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Grey Gemstones

Gibbsite Vs Vanadinite

Gibbsite Vs Pallasite

Gibbsite Vs Galena

Gibbsite and Brucite Specific Gravity

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