Poldervaartite and Onyx Physical Properties

Poldervaartite

Onyx

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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

2.912.55-2.70

1 7.18

1.5 Fracture

Handbook of mineralogy (2001)

Not Available

1.6 Cleavage

None

Indiscernible

1.7 Mohs Hardness

Not Available6.5-7

2 10

1.8 Chemical Composition

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

SiO₂

Poldervaartite and Onyx Chemical Formula

While comparing Poldervaartite and Onyx 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 Poldervaartite and Onyx chemical formula.

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

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Poldervaartite and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Poldervaartite and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Poldervaartite and Onyx Optical Properties during the identification of gemstone. Specific gravity of Poldervaartite is 2.55-2.70 whereas that of Onyx is 2.55-2.70.