Purpurite and Almandine Physical Properties

Purpurite

Almandine

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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

3.2-3.4

3.95-4.30

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

[100] [001] perfect

none

1.7 Mohs Hardness

4-4.5

7-7.5

1.8 Chemical Composition

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

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

Purpurite and Almandine Chemical Formula

While comparing Purpurite and Almandine 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 Purpurite and Almandine chemical formula.

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

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Purpurite and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Purpurite and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Purpurite and Almandine Optical Properties during the identification of gemstone. Specific gravity of Purpurite is 3.95-4.30 whereas that of Almandine is 3.95-4.30.