Melanite and Star Sapphire Physical Properties

Melanite

Star Sapphire

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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

3.70-4.103.90-4.05

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Not Available

1.7 Mohs Hardness

6.5-7Not Available

2 10

1.8 Chemical Composition

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

Al 2O 3Ulrich Henn and Claudio C.

Melanite and Star Sapphire Chemical Formula

While comparing Melanite and Star Sapphire 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 Star Sapphire chemical formula.

Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.

Compare Black Gemstones

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Melanite Vs Pyrargyrite

Melanite Vs Quartz

Melanite and Star Sapphire Specific Gravity

Another important criteria for qualitative analysis of gemstones is Melanite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Melanite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Melanite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.