Galena and Agate Opal Physical Properties

Galena

Agate 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

6.231.98-2.50

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Cubic perfect on [001], parting on [111]

Not Available

1.7 Mohs Hardness

2.5-2.755.5-6.5

2 10

1.8 Chemical Composition

PbS

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

Galena and Agate Opal Chemical Formula

While comparing Galena and Agate 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 Galena and Agate Opal chemical formula.

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

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Galena and Agate Opal Specific Gravity

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