Onyx and Rhodochrosite Physical Properties

Onyx

Rhodochrosite

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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

2.55-2.703.0-3.3

1 7.18

1.5 Fracture

Not Available

Uneven, Conchoidal, Conchoidal to uneven, Brittle

1.6 Cleavage

Indiscernible

On {10 1 1} perfect; parting on {10 1 2}

1.7 Mohs Hardness

6.5-73.5-4

2 10

1.8 Chemical Composition

SiO₂

MnCO₃

Onyx and Rhodochrosite Chemical Formula

While comparing Onyx and Rhodochrosite 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 Rhodochrosite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Rhodochrosite- MnCO₃

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Onyx and Rhodochrosite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Rhodochrosite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Rhodochrosite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.0-3.3 whereas that of Rhodochrosite is 3.0-3.3.