Thulite and Vivianite Physical Properties

Thulite

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

3.12.64-2.70

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

(e.g. graphite).

1.6 Cleavage

Perfect {010} imperfect {100}

{010} Perfect

1.7 Mohs Hardness

6-7Not Available

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Thulite and Vivianite Chemical Formula

While comparing Thulite 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 Thulite and Vivianite chemical formula.

Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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Thulite and Vivianite Specific Gravity

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