Schorl and Covellite Physical Properties

Schorl

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.18-3.224.6-4.76

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

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

1.6 Cleavage

{1011} Indistinct

Perfect on {0001}

1.7 Mohs Hardness

Not AvailableNot Available

2 10

1.8 Chemical Composition

Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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

Schorl and Covellite Chemical Formula

While comparing Schorl and Covellite 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 Schorl and Covellite chemical formula.

Chemical formula of Schorl- Na(Fe2+3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Black Gemstones

Schorl Vs Snowflake Obsidian

Schorl Vs Xenotime

Schorl Vs Triplite

Schorl and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Schorl and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Schorl and Covellite Optical Properties during the identification of gemstone. Specific gravity of Schorl is 4.6-4.76 whereas that of Covellite is 4.6-4.76.