Dravite and Pyrargyrite Physical Properties

Dravite

Pyrargyrite

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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

3.03-3.185.85

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle

1.6 Cleavage

{???} Indistinct

Distinct on {10 1 1}, imperfect on {01 1 2}

1.7 Mohs Hardness

7-7.52.5-3

2 10

1.8 Chemical Composition

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

Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Dravite and Pyrargyrite Chemical Formula

While comparing Dravite and Pyrargyrite 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 Dravite and Pyrargyrite chemical formula.

Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Chemical formula of Pyrargyrite- Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dravite and Pyrargyrite Specific Gravity

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