Poudretteite and Grandidierite Physical Properties

Poudretteite

Grandidierite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.51-2.532.85-3.00

1 7.18

1.5 Fracture

Conchoidal, Splintery

Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven

1.6 Cleavage

None

Perfect

1.7 Mohs Hardness

57.5

2 10

1.8 Chemical Composition

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Poudretteite and Grandidierite Chemical Formula

While comparing Poudretteite and Grandidierite 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 Poudretteite and Grandidierite chemical formula.

Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

Compare Violet Gemstones

Poudretteite Vs Rutilated Quartz

Poudretteite Vs Rubellite

Poudretteite Vs Sapphire

Poudretteite and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poudretteite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poudretteite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Poudretteite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.