Chrysoprase and Dravite Physical Properties

Chrysoprase

Dravite

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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

2.58-2.643.03-3.18

1 7.18

1.5 Fracture

Gems, Sixth Edition (2006)

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

1.6 Cleavage

None

{???} Indistinct

1.7 Mohs Hardness

6.5-77-7.5

2 10

1.8 Chemical Composition

SiO₂ (with a high level of nickel impurities )

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

Chrysoprase and Dravite Chemical Formula

While comparing Chrysoprase and Dravite 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 Chrysoprase and Dravite chemical formula.

Chemical formula of Chrysoprase- SiO₂ (with a high level of nickel impurities )
Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Chrysoprase and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chrysoprase and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chrysoprase and Dravite Optical Properties during the identification of gemstone. Specific gravity of Chrysoprase is 3.03-3.18 whereas that of Dravite is 3.03-3.18.