Stolzite and Common Opal Physical Properties

Stolzite

Common 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

21.98-2.50

1 7.18

1.5 Fracture

Conchoidal, Uneven, Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Imperfect on {001}, indistinct on {011}

Not Available

1.7 Mohs Hardness

2.5-35.5-6.5

2 10

1.8 Chemical Composition

Not Available

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Stolzite and Common Opal Chemical Formula

While comparing Stolzite and Common 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 Stolzite and Common Opal chemical formula.

Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Stolzite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Stolzite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Stolzite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Stolzite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.