Cordierite and Vivianite Physical Properties

Cordierite

Vivianite

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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

2.57-2.662.64-2.70

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

(e.g. graphite).

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

{010} Perfect

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Vivianite Chemical Formula

While comparing Cordierite 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 Cordierite and Vivianite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

Cordierite Vs Plumbogummite

Cordierite Vs Rosasite

Cordierite Vs Riebeckite

Cordierite and Vivianite Specific Gravity

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