Adamite and Melanite Physical Properties

Adamite

Melanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.32-4.48

3.70-4.10

1.5 Fracture

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

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

1.6 Cleavage

{101}, good; {010}, poor

Not Available

1.7 Mohs Hardness

3.5

6.5-7

1.8 Chemical Composition

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Adamite and Melanite Chemical Formula

While comparing Adamite and Melanite 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 Adamite and Melanite chemical formula.

Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Adamite and Melanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Adamite and Melanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Adamite and Melanite Optical Properties during the identification of gemstone. Specific gravity of Adamite is 3.70-4.10 whereas that of Melanite is 3.70-4.10.