Onyx and Fluorite Physical Properties

Onyx

Fluorite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.00-3.25

1 7.18

1.5 Fracture

Not Available

Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

Indiscernible

Octahedral, perfect on {111}, parting on {011}

1.7 Mohs Hardness

6.5-74

2 10

1.8 Chemical Composition

SiO₂

CaF₂

Onyx and Fluorite Chemical Formula

While comparing Onyx and Fluorite 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 Fluorite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Fluorite- CaF₂

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Onyx and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.