Melanite and Purpurite Physical Properties

Melanite

Purpurite

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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

3.70-4.103.2-3.4

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Not Available

[100] [001] perfect

1.7 Mohs Hardness

6.5-74-4.5

2 10

1.8 Chemical Composition

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

MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Melanite and Purpurite Chemical Formula

While comparing Melanite and Purpurite 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 Melanite and Purpurite chemical formula.

Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references

Compare Black Gemstones

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Melanite Vs Proustite

Melanite Vs Quartz

Melanite and Purpurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Melanite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Melanite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Melanite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.