Dravite and Apophyllite Physical Properties

Dravite

Apophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.03-3.182.30-2.50

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

{???} Indistinct

Perfect on (001)

1.7 Mohs Hardness

7-7.54.5-5

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)

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Dravite and Apophyllite Chemical Formula

While comparing Dravite and Apophyllite 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 Apophyllite 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 Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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Dravite and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.