Dravite and Star Ruby Physical Properties

Dravite

Star Ruby

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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

3.03-3.183.95-4.10

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

{???} Indistinct

Not Available

1.7 Mohs Hardness

7-7.5Not Available

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)

Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Dravite and Star Ruby Chemical Formula

While comparing Dravite and Star Ruby 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 Star Ruby 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 Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Dravite and Star Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Star Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Star Ruby Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.95-4.10 whereas that of Star Ruby is 3.95-4.10.