Gibbsite and Gahnite Physical Properties

Gibbsite

Gahnite

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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

2.354.00-4.62

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Conchoidal, Uneven

1.6 Cleavage

{001} Perfect

Indistinct parting on [111]

1.7 Mohs Hardness

2.5-37.5-8

2 10

1.8 Chemical Composition

Al(OH)3

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Gibbsite and Gahnite Chemical Formula

While comparing Gibbsite and Gahnite 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 Gahnite chemical formula.

Chemical formula of Gibbsite- Al(OH)3
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Grey Gemstones

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Gibbsite Vs Vanadinite

Gibbsite Vs Galena

Gibbsite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.