Dravite and Pyromorphite Physical Properties

Dravite

Pyromorphite

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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

3.03-3.186.5-7.1

1 7.18

1.5 Fracture

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

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

1.6 Cleavage

{???} Indistinct

Imperfect- [10 1 1]

1.7 Mohs Hardness

7-7.53.5-4

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)

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Dravite and Pyromorphite Chemical Formula

While comparing Dravite and Pyromorphite 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 Pyromorphite 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 Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Dravite and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.