Gibbsite and Chrome-Chalcedony Physical Properties

Gibbsite

Chrome-Chalcedony

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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

2.352.55-2.70

1 7.18

1.5 Fracture

Fibrous, Difficult, Fibrous

Not Available

1.6 Cleavage

{001} Perfect

Not Available

1.7 Mohs Hardness

2.5-36.5-7

2 10

1.8 Chemical Composition

Al(OH)3

SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

Gibbsite and Chrome-Chalcedony Chemical Formula

While comparing Gibbsite and Chrome-Chalcedony 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 Chrome-Chalcedony chemical formula.

Chemical formula of Gibbsite- Al(OH)3
Chemical formula of Chrome-Chalcedony- SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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Gibbsite and Chrome-Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gibbsite and Chrome-Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gibbsite and Chrome-Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Gibbsite is 2.55-2.70 whereas that of Chrome-Chalcedony is 2.55-2.70.