Grossular and Crystal Opal Physical Properties

Grossular

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

3.55-3.731.97-2.22

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

none

Not Available

1.7 Mohs Hardness

7-7.55.5-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Grossular and Crystal Opal Chemical Formula

While comparing Grossular 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 Grossular and Crystal Opal chemical formula.

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

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Grossular and Crystal Opal Specific Gravity

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