Dravite and Phenakite Physical Properties

Dravite

Phenakite

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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

3.03-3.182.90-2.98

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle

1.6 Cleavage

{???} Indistinct

Distinct on {11 2 0}, imperfect on {10 1 1}

1.7 Mohs Hardness

7-7.57.5-8

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)

Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Dravite and Phenakite Chemical Formula

While comparing Dravite and Phenakite 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 Phenakite 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 Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Dravite and Phenakite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Phenakite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Phenakite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.90-2.98 whereas that of Phenakite is 2.90-2.98.