Labradorite and Vivianite Physical Properties

Labradorite

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

2.69-2.722.64-2.70

1 7.18

1.5 Fracture

Uneven, Conchoidal, Gems, Sixth Edition (2006)

(e.g. graphite).

1.6 Cleavage

Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}

{010} Perfect

1.7 Mohs Hardness

6-6.5Not Available

2 10

1.8 Chemical Composition

(Na,Ca)_1-2Si_3-2O₈

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

Labradorite and Vivianite Chemical Formula

While comparing Labradorite 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 Labradorite and Vivianite chemical formula.

Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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Labradorite and Vivianite Specific Gravity

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