Mellite and Black Opal Physical Properties

Mellite

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

1.58-1.601.97-2.22

1 7.18

1.5 Fracture

ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

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

1.6 Cleavage

{011} Imperfect

Not Available

1.7 Mohs Hardness

26-6.5

2 10

1.8 Chemical Composition

Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

SiO 2 + H 2OUlrich Henn and Claudio C.

Mellite and Black Opal Chemical Formula

While comparing Mellite 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 Mellite and Black Opal chemical formula.

Chemical formula of Mellite- Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Brown Gemstones

Mellite Vs Narsarsukite

Mellite Vs Mother of Pearl

Mellite Vs Morion

Mellite and Black Opal Specific Gravity

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