Onyx and Orthoclase Physical Properties

Onyx

Orthoclase

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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

2.55-2.702.54-2.61

1 7.18

1.5 Fracture

Not Available

Gems, Uneven

1.6 Cleavage

Indiscernible

Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.

1.7 Mohs Hardness

6.5-76

2 10

1.8 Chemical Composition

SiO₂

KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Onyx and Orthoclase Chemical Formula

While comparing Onyx and Orthoclase 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 Orthoclase chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Orthoclase- KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Onyx and Orthoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Orthoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Orthoclase Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.54-2.61 whereas that of Orthoclase is 2.54-2.61.