Andradite and Crystal Opal Physical Properties

Andradite

Crystal Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-4.101.97-2.22

1 7.18

1.5 Fracture

Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

none

Not Available

1.7 Mohs Hardness

6.5-75.5-6.5

2 10

1.8 Chemical Composition

Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

SiO 2 + H 2OUlrich Henn and Claudio C.

Andradite and Crystal Opal Chemical Formula

While comparing Andradite and Crystal 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 and Crystal Opal chemical formula.

Chemical formula of Andradite- Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Green Gemstones

Andradite Vs Augite

Andradite Vs Astrophyllite

Andradite Vs Aragonite

Andradite and Crystal Opal Specific Gravity

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