Kyanite and Vivianite Physical Properties

Kyanite

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

3.53-3.652.64-2.70

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

(e.g. graphite).

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

{010} Perfect

1.7 Mohs Hardness

4-7Not Available

2 10

1.8 Chemical Composition

Not Available

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

Kyanite and Vivianite Chemical Formula

While comparing Kyanite 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 Kyanite and Vivianite chemical formula.

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

Compare Blue Gemstones

Kyanite Vs Blue quartz

Kyanite Vs Kashmir sapphire

Kyanite Vs Swiss blue topaz

Kyanite and Vivianite Specific Gravity

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