Onyx and Poldervaartite Physical Properties

Onyx

Poldervaartite

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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

2.55-2.702.91

1 7.18

1.5 Fracture

Not Available

Handbook of mineralogy (2001)

1.6 Cleavage

Indiscernible

None

1.7 Mohs Hardness

6.5-7Not Available

2 10

1.8 Chemical Composition

SiO₂

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Onyx and Poldervaartite Chemical Formula

While comparing Onyx and Poldervaartite 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 Poldervaartite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

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Onyx and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.91 whereas that of Poldervaartite is 2.91.