Gibbsite and Obsidian Physical Properties

Gibbsite

Obsidian

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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

2.352.35-2.60

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Conchoidal, ConchoidalWalter Schumann, Conchoidal

1.6 Cleavage

{001} Perfect

Not Available

1.7 Mohs Hardness

2.5-35-5.5

2 10

1.8 Chemical Composition

Al(OH)3

Not Available

Gibbsite and Obsidian Chemical Formula

While comparing Gibbsite and Obsidian 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 Obsidian chemical formula.

Chemical formula of Gibbsite- Al(OH)3

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Gibbsite Vs Galena

Gibbsite and Obsidian Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Obsidian Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Obsidian Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.35-2.60 whereas that of Obsidian is 2.35-2.60.