Iddingsite and Crystal Opal Physical Properties

Iddingsite

Crystal 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

2.5-2.81.97-2.22

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

{???} Perfect

Not Available

1.7 Mohs Hardness

35.5-6.5

2 10

1.8 Chemical Composition

MgO.Fe2O3.3SiO2•4(H2O)

SiO 2 + H 2OUlrich Henn and Claudio C.

Iddingsite and Crystal Opal Chemical Formula

While comparing Iddingsite 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 Iddingsite and Crystal Opal chemical formula.

Chemical formula of Iddingsite- MgO.Fe2O3.3SiO2•4(H2O)
Chemical formula of Crystal Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Iddingsite and Crystal Opal Specific Gravity

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