Precious Opal and Scolecite Physical Properties

Precious Opal

Scolecite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.252.20-2.23

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

Irregular/uneven, UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Uneven

1.6 Cleavage

Not Available

Perfect on {110} and {1 1 0}

1.7 Mohs Hardness

5-6.55-5.5

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.

Precious Opal and Scolecite Chemical Formula

While comparing Precious Opal and Scolecite 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 Precious Opal and Scolecite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Scolecite- CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

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Precious Opal Vs Sardonyx

Precious Opal and Scolecite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Scolecite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Scolecite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.20-2.23 whereas that of Scolecite is 2.20-2.23.