Covellite and Holmquistite Physical Properties

Covellite

Holmquistite

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1 Physical Properties

1.1 Tenacity

Flexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.6-4.762.95-3.13

1 7.18

1.5 Fracture

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

Not Available

1.6 Cleavage

Perfect on {0001}

{210} Perfect

1.7 Mohs Hardness

Not Available5-6

2 10

1.8 Chemical Composition

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Covellite and Holmquistite Chemical Formula

While comparing Covellite and Holmquistite 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 Covellite and Holmquistite chemical formula.

Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Holmquistite- Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Covellite Vs Fluorapatite

Covellite Vs Falcons Eye

Covellite and Holmquistite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Covellite and Holmquistite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Covellite and Holmquistite Optical Properties during the identification of gemstone. Specific gravity of Covellite is 2.95-3.13 whereas that of Holmquistite is 2.95-3.13.