Melanite and Prehnite Physical Properties

Melanite

Prehnite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.10

2.80-2.95

1.5 Fracture

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

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

1.6 Cleavage

Not Available

Distinct on [001]

1.7 Mohs Hardness

6.5-7

6-6.5

1.8 Chemical Composition

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

Ca₂Al₂Si₃O₁₂(OH)

Melanite and Prehnite Chemical Formula

While comparing Melanite and Prehnite 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 Prehnite chemical formula.

Chemical formula of Melanite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)

Compare Black Gemstones

Melanite Vs Proustite

Melanite Vs Pyrargyrite

Melanite Vs Quartz

Melanite and Prehnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Melanite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Melanite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Melanite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.