Willemite and Vivianite Physical Properties

Willemite

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

3.89-4.18

2.64-2.70

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven

(e.g. graphite).

1.6 Cleavage

{0001}, {11 2 0} imperfect

{010} Perfect

1.7 Mohs Hardness

5.5

Not Available

1.8 Chemical Composition

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Willemite and Vivianite Chemical Formula

While comparing Willemite 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 Willemite and Vivianite chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Compare Red Gemstones

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Willemite and Vivianite Specific Gravity

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