Piemontite and Grandidierite Physical Properties

Piemontite

Grandidierite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

Not Available2.85-3.00

1 7.18

1.5 Fracture

Uneven, Splintery

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

1.6 Cleavage

[001] good, [100] distinct

Perfect

1.7 Mohs Hardness

6-6.57.5

2 10

1.8 Chemical Composition

Not Available

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

Piemontite and Grandidierite Chemical Formula

While comparing Piemontite and Grandidierite 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 Piemontite and Grandidierite chemical formula.

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

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Piemontite and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Piemontite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.