Grandidierite and Benitoite Physical Properties

Grandidierite

Benitoite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Insoluble: HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.003.61-3.68

1 7.18

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Perfect

[10 1 1] poor

1.7 Mohs Hardness

7.56-6.5

2 10

1.8 Chemical Composition

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

BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Grandidierite and Benitoite Chemical Formula

While comparing Grandidierite and Benitoite 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 Benitoite chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Benitoite- BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Grandidierite and Benitoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Benitoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Benitoite Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 3.61-3.68 whereas that of Benitoite is 3.61-3.68.