Carnelian and Melanite Physical Properties

Carnelian

Melanite

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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

2.58-2.64

3.70-4.10

1.5 Fracture

Uneven, Splintery, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

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

1.6 Cleavage

Absent

Not Available

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO₂

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

Carnelian and Melanite Chemical Formula

While comparing Carnelian 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 Carnelian and Melanite chemical formula.

Chemical formula of Carnelian- SiO₂
Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Carnelian and Melanite Specific Gravity

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