Common Opal and Mellite Physical Properties

Common Opal

Mellite

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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

1.98-2.501.58-1.60

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

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

1.6 Cleavage

Not Available

{011} Imperfect

1.7 Mohs Hardness

5.5-6.52

2 10

1.8 Chemical Composition

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

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

Common Opal and Mellite Chemical Formula

While comparing Common Opal and Mellite 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 Common Opal and Mellite chemical formula.

Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Chemical formula of Mellite- Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

Common Opal Vs Dumortierite

Common Opal Vs Dravite

Common Opal Vs Diamond

Common Opal and Mellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Mellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Mellite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 1.58-1.60 whereas that of Mellite is 1.58-1.60.