Dravite and Hibschite Physical Properties

Dravite

Hibschite

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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

3.03-3.183.05-3.08

1 7.18

1.5 Fracture

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

Uneven, Uneven, Irregular, Management Team (2012), Conchoidal, Brittle

1.6 Cleavage

{???} Indistinct

None

1.7 Mohs Hardness

7-7.56.5

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)

Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)

Dravite and Hibschite Chemical Formula

While comparing Dravite and Hibschite 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 Hibschite 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 Hibschite- Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)

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Dravite and Hibschite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Hibschite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Hibschite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.05-3.08 whereas that of Hibschite is 3.05-3.08.