Onyx and Crocoite Physical Properties

Onyx

Crocoite

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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

2.55-2.705.90-6.10

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

1.6 Cleavage

Indiscernible

{110} Distinct, {001} Indistinct, {100} Indistinct

1.7 Mohs Hardness

6.5-72.5-3

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Crocoite Chemical Formula

While comparing Onyx and Crocoite 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 Crocoite chemical formula.

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

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Onyx and Crocoite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Crocoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Crocoite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 5.90-6.10 whereas that of Crocoite is 5.90-6.10.