Gahnospinel and Common Opal Physical Properties

Gahnospinel

Common Opal

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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

3.65-4.551.98-2.50

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

None, but may exhibit slight parting

Not Available

1.7 Mohs Hardness

7.5-85.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Gahnospinel and Common Opal Chemical Formula

While comparing Gahnospinel and Common Opal 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 Common Opal chemical formula.

Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Compare Blue Gemstones

Gahnospinel Vs Hydrogrossular

Gahnospinel Vs Jeremejevite

Gahnospinel Vs Indicolite Blue Tourmaline

Gahnospinel and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnospinel and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnospinel and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Gahnospinel is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.