Vivianite and Grandidierite Physical Properties

Vivianite

Grandidierite

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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

2.64-2.702.85-3.00

1 7.18

1.5 Fracture

(e.g. graphite).

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

1.6 Cleavage

{010} Perfect

Perfect

1.7 Mohs Hardness

Not Available7.5

2 10

1.8 Chemical Composition

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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

Vivianite and Grandidierite Chemical Formula

While comparing Vivianite 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 Vivianite and Grandidierite chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.

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Vivianite and Grandidierite Specific Gravity

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