Andradite Garnet and Black Opal Physical Properties

Andradite Garnet

Black Opal

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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

3.8-3.91.97-2.22

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

None

Not Available

1.7 Mohs Hardness

6.5-7.56-6.5

2 10

1.8 Chemical Composition

Ca₃Fe³⁺₂Si₃O₁₂

SiO 2 + H 2OUlrich Henn and Claudio C.

Andradite Garnet and Black Opal Chemical Formula

While comparing Andradite Garnet and Black Opal 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 Andradite Garnet and Black Opal chemical formula.

Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Andradite Garnet Vs Lemon quartz

Andradite Garnet and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite Garnet and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite Garnet and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Andradite Garnet is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.