Grandidierite and Pyrophyllite Physical Properties

Grandidierite

Pyrophyllite

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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

2.85-3.002.65-2.90

1 7.18

1.5 Fracture

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

Gemstones (2009), Flexible Flexible fragments.

1.6 Cleavage

Perfect

{001} Perfect

1.7 Mohs Hardness

7.5Not Available

2 10

1.8 Chemical Composition

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

Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Grandidierite and Pyrophyllite Chemical Formula

While comparing Grandidierite and Pyrophyllite 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 Grandidierite and Pyrophyllite chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Grandidierite and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.