Vivianite and Spinel Physical Properties

Vivianite

Spinel

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.64-2.703.64-3.66

1 7.18

1.5 Fracture

(e.g. graphite).

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

{010} Perfect

None, but may exhibit slight parting

1.7 Mohs Hardness

Not Available8

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Vivianite and Spinel Chemical Formula

While comparing Vivianite and Spinel 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 Spinel chemical formula.

Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Chemical formula of Spinel- MgAl₂O₄

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Vivianite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.