Grandidierite and Fire Opal Physical Properties

Grandidierite

Fire Opal

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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

2.85-3.001.97-2.22

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Perfect

Not Available

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.

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

Grandidierite and Fire Opal Chemical Formula

While comparing Grandidierite and Fire Opal 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 Fire Opal chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

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Grandidierite and Fire Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.