Onyx and Nephrite Physical Properties

Onyx

Nephrite

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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

2.55-2.702.90-3.10

1 7.18

1.5 Fracture

Not Available

Splintery, Granular, Splintery, Granular, Gemstones (2009)

1.6 Cleavage

Indiscernible

Not Available

1.7 Mohs Hardness

6.5-76-6.5

2 10

1.8 Chemical Composition

SiO₂

Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references

Onyx and Nephrite Chemical Formula

While comparing Onyx and Nephrite 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 Nephrite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references

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Onyx and Nephrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Nephrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Nephrite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.90-3.10 whereas that of Nephrite is 2.90-3.10.