Onyx and Pectolite Physical Properties

Onyx

Pectolite

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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

2.55-2.702.74-2.90

1 7.18

1.5 Fracture

Not Available

Uneven, Gemstones (2009), Splintery

1.6 Cleavage

Indiscernible

Perfect on {100} and {001}

1.7 Mohs Hardness

6.5-74.5-5

2 10

1.8 Chemical Composition

SiO₂

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Onyx and Pectolite Chemical Formula

While comparing Onyx and Pectolite 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 Pectolite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

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Onyx and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.