Variscite and Onyx Physical Properties

Variscite

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

2.42-2.582.55-2.70

1 7.18

1.5 Fracture

Conchoidal, Splintery, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle

Not Available

1.6 Cleavage

[010] perfect

Indiscernible

1.7 Mohs Hardness

4-56.5-7

2 10

1.8 Chemical Composition

AlPO₄ · 2(H₂O)

SiO₂

Variscite and Onyx Chemical Formula

While comparing Variscite 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 Variscite and Onyx chemical formula.

Chemical formula of Variscite- AlPO₄ · 2(H₂O)
Chemical formula of Onyx- SiO₂

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Variscite and Onyx Specific Gravity

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