Grandidierite and Ruby Physical Properties

Grandidierite

Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.85-3.003.97-4.05

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

Perfect

No true cleavage

1.7 Mohs Hardness

7.59

2 10

1.8 Chemical Composition

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

Al ₂ O ₃

Grandidierite and Ruby Chemical Formula

While comparing Grandidierite and Ruby 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 Ruby chemical formula.

Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Chemical formula of Ruby- Al ₂ O ₃

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Grandidierite and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Grandidierite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.