Riebeckite and Scheelite Physical Properties

Riebeckite

Scheelite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.28-3.445.9-6.3

1 7.18

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Fracture

Uneven, Splintery

Conchoidal, Uneven

Cleavage

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

On {101}, distinct; on {112}, interrupted; on {001}, indistinct

Mohs Hardness

5.0-6.04.5-5

2 10

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Chemical Composition

Na2Fe2+3Fe3+2Si8O22(OH)2

CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Riebeckite and Scheelite Chemical Formula

While comparing Riebeckite and Scheelite 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 Riebeckite and Scheelite chemical formula.

Chemical formula of Riebeckite- Na2Fe2+3Fe3+2Si8O22(OH)2
Chemical formula of Scheelite- CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Riebeckite and Scheelite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Riebeckite and Scheelite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Riebeckite and Scheelite Optical Properties during the identification of gemstone. Specific gravity of Riebeckite is 5.9-6.3 whereas that of Scheelite is 5.9-6.3.