Dravite and Chrysoprase Physical Properties

Dravite

Chrysoprase

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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

3.03-3.182.58-2.64

1 7.18

1.5 Fracture

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

Gems, Sixth Edition (2006)

1.6 Cleavage

{???} Indistinct

None

1.7 Mohs Hardness

7-7.56.5-7

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)

SiO₂ (with a high level of nickel impurities )

Dravite and Chrysoprase Chemical Formula

While comparing Dravite and Chrysoprase 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 Chrysoprase 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 Chrysoprase- SiO₂ (with a high level of nickel impurities )

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Dravite and Chrysoprase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Chrysoprase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Chrysoprase Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.58-2.64 whereas that of Chrysoprase is 2.58-2.64.