Ettringite and Cuprite Physical Properties

Ettringite

Cuprite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.775.85-6.15

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {10 1 0}

Fair in four directions forming octahedrons

1.7 Mohs Hardness

2-2.53.5-4

2 10

1.8 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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

Ettringite and Cuprite Chemical Formula

While comparing Ettringite 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 Ettringite and Cuprite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Ettringite and Cuprite Specific Gravity

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