Gibbsite and Zinnwaldite Physical Properties

Gibbsite

Zinnwaldite

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1 Physical Properties

1.1 Tenacity

Not Available

Elastic

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.352.9-3.1

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Uneven

1.6 Cleavage

{001} Perfect

Perfect basal {001}

1.7 Mohs Hardness

2.5-33.5-4.0

2 10

1.8 Chemical Composition

Al(OH)3

Not Available

Gibbsite and Zinnwaldite Chemical Formula

While comparing Gibbsite and Zinnwaldite 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 Zinnwaldite chemical formula.

Chemical formula of Gibbsite- Al(OH)3

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Gibbsite and Zinnwaldite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Zinnwaldite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Zinnwaldite Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.9-3.1 whereas that of Zinnwaldite is 2.9-3.1.