Boulder Opal and Gahnite Physical Properties

Boulder Opal

Gahnite

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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

1.98-2.254.00-4.62

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Uneven

1.6 Cleavage

Not Available

Indistinct parting on [111]

1.7 Mohs Hardness

5-6.57.5-8

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Boulder Opal and Gahnite Chemical Formula

While comparing Boulder Opal and Gahnite 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 Boulder Opal and Gahnite chemical formula.

Chemical formula of Boulder Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Boulder Opal Vs Chrysocolla

Boulder Opal Vs Chrome-Chalcedony

Boulder Opal Vs Chrome Tourmaline

Boulder Opal and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Boulder Opal and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boulder Opal and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Boulder Opal is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.