Melanite and Poldervaartite Physical Properties

Melanite

Poldervaartite

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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

3.70-4.102.91

1 7.18

1.5 Fracture

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

Handbook of mineralogy (2001)

1.6 Cleavage

Not Available

None

1.7 Mohs Hardness

6.5-7Not Available

2 10

1.8 Chemical Composition

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

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Melanite and Poldervaartite Chemical Formula

While comparing Melanite and Poldervaartite 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 Poldervaartite chemical formula.

Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Compare Black Gemstones

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Melanite Vs Pyrargyrite

Melanite and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Melanite and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Melanite and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Melanite is 2.91 whereas that of Poldervaartite is 2.91.