Gibbsite and Sunstone Physical Properties

Gibbsite

Sunstone

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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

2.352.62-2.65

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Gemstones of the world (2001)

1.6 Cleavage

{001} Perfect

001

1.7 Mohs Hardness

2.5-36

2 10

1.8 Chemical Composition

Al(OH)3

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Gibbsite and Sunstone Chemical Formula

While comparing Gibbsite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Gibbsite- Al(OH)3
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Gibbsite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.