Gahnite and Vivianite Physical Properties

Gahnite

Vivianite

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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

4.00-4.622.64-2.70

1 7.18

1.5 Fracture

Conchoidal, Uneven

(e.g. graphite).

1.6 Cleavage

Indistinct parting on [111]

{010} Perfect

1.7 Mohs Hardness

7.5-8Not Available

2 10

1.8 Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Gahnite and Vivianite Chemical Formula

While comparing Gahnite and Vivianite 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 Gahnite and Vivianite chemical formula.

Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

Gahnite Vs Howlite

Gahnite Vs Indicolite Blue Tourmaline

Gahnite Vs Hydrogrossular

Gahnite and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Gahnite and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnite and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Gahnite is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.