Onyx and Scheelite Physical Properties

Onyx

Scheelite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.705.9-6.3

1 7.18

1.5 Fracture

Not Available

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Uneven

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

6.5-74.5-5

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Scheelite Chemical Formula

While comparing Onyx 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 Onyx and Scheelite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Scheelite- CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Onyx and Scheelite Specific Gravity

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