Grandidierite and Gahnospinel Physical Properties

Grandidierite

Gahnospinel

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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

2.85-3.003.65-4.55

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect

None, but may exhibit slight parting

1.7 Mohs Hardness

7.57.5-8

2 10

1.8 Chemical Composition

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

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Grandidierite and Gahnospinel Chemical Formula

While comparing Grandidierite and Gahnospinel 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 Gahnospinel chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Grandidierite and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.