Agate Opal and Galena Physical Properties

Agate Opal

Galena

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.506.23

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001)

Subconchoidal, Brittle, Metallic

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

5.5-6.52.5-2.75

2 10

1.8 Chemical Composition

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

PbS

Agate Opal and Galena Chemical Formula

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

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

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Agate Opal Vs Anthophyllite

Agate Opal and Galena Specific Gravity

Another important criteria for qualitative analysis of gemstones is Agate Opal and Galena Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Agate Opal and Galena Optical Properties during the identification of gemstone. Specific gravity of Agate Opal is 6.23 whereas that of Galena is 6.23.