Hackmanite and Black Opal Physical Properties

Hackmanite

Black 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

2.27-2.33

1.97-2.22

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

Not Available

1.7 Mohs Hardness

5.5-6

6-6.5

1.8 Chemical Composition

Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)

SiO 2 + H 2OUlrich Henn and Claudio C.

Hackmanite and Black Opal Chemical Formula

While comparing Hackmanite and Black 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 Hackmanite and Black Opal chemical formula.

Chemical formula of Hackmanite- Na 8Al 6Si 6O 24Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Semi Precious Gemstones

Hackmanite Vs Turquoise

Hackmanite Vs Tourmaline

Hackmanite Vs Tanzanite

Hackmanite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hackmanite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hackmanite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Hackmanite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.