Onyx and Moonstone Physical Properties

Onyx

Moonstone

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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

2.55-2.702.56-2.60

1 7.18

1.5 Fracture

Not Available

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Indiscernible

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

1.7 Mohs Hardness

6.5-76-6.5

2 10

1.8 Chemical Composition

SiO₂

Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

Onyx and Moonstone Chemical Formula

While comparing Onyx and Moonstone 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 Moonstone chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

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Onyx and Moonstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Moonstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Moonstone Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.56-2.60 whereas that of Moonstone is 2.56-2.60.