Onyx and Hibonite Physical Properties

Onyx

Hibonite

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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

2.55-2.703.84

1 7.18

1.5 Fracture

Not Available

Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

Indiscernible

{0001} good, {10 1 0} parting

1.7 Mohs Hardness

6.5-77.5-8

2 10

1.8 Chemical Composition

SiO₂

(Ca,Ce)(Al,Ti,Mg)12O19

Onyx and Hibonite Chemical Formula

While comparing Onyx and Hibonite 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 Hibonite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19

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Onyx and Hibonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 3.84 whereas that of Hibonite is 3.84.