Almandine and Cuprite Physical Properties

Almandine

Cuprite

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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

3.95-4.30

5.85-6.15

1.5 Fracture

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

Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

none

Fair in four directions forming octahedrons

1.7 Mohs Hardness

7-7.5

3.5-4

1.8 Chemical Composition

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

Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Almandine and Cuprite Chemical Formula

While comparing Almandine and Cuprite 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 Cuprite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Almandine and Cuprite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Cuprite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Cuprite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 5.85-6.15 whereas that of Cuprite is 5.85-6.15.