Gahnospinel and Onyx Physical Properties

Gahnospinel

Onyx

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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

3.65-4.552.55-2.70

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009)

Not Available

1.6 Cleavage

None, but may exhibit slight parting

Indiscernible

1.7 Mohs Hardness

7.5-86.5-7

2 10

1.8 Chemical Composition

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

SiO₂

Gahnospinel and Onyx Chemical Formula

While comparing Gahnospinel and Onyx 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 Gahnospinel and Onyx chemical formula.

Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Onyx- SiO₂

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Gahnospinel and Onyx Specific Gravity

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