Almandine and Dumortierite Physical Properties

Almandine

Dumortierite

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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

3.95-4.30

3.26-3.41

1.5 Fracture

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

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

none

Distinct on {100}, poor on {110}; parting on {001}

1.7 Mohs Hardness

7-7.5

7-8.5

1.8 Chemical Composition

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

AlAl₆O₃BSi₃O₁₈

Almandine and Dumortierite Chemical Formula

While comparing Almandine and Dumortierite 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 Almandine and Dumortierite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Almandine and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.