Onyx and Diaspore Physical Properties

Onyx

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.30-3.40

1 7.18

1.5 Fracture

Not Available

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Indiscernible

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

6.5-76.5-7

2 10

1.8 Chemical Composition

SiO₂

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Onyx and Diaspore Chemical Formula

While comparing Onyx and Diaspore 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 Diaspore chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Onyx and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.