Pargasite and Pyrargyrite Physical Properties

Pargasite

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

3.04-3.265.85

1 7.18

1.5 Fracture

Splintery, Brittle, Uneven

Conchoidal, Uneven, ConchoidalArthur Thomas, Brittle

1.6 Cleavage

{110} perfect

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

1.7 Mohs Hardness

5-62.5-3

2 10

1.8 Chemical Composition

NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Pargasite and Pyrargyrite Chemical Formula

While comparing Pargasite 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 Pargasite and Pyrargyrite chemical formula.

Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pyrargyrite- Ag 3SbS 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Pargasite and Pyrargyrite Specific Gravity

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