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Piemontite
Piemontite

Opal
Opal



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Piemontite
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Opal

Piemontite and Opal Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
BrittleWalter Schumann
1.2 Solubility
Not Available
hot salt water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available1.98-2.25
Amber
1 7.18
1.5 Fracture
Uneven, Splintery
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
[001] good, [100] distinct
None
1.7 Mohs Hardness
6-6.55-6.5
Amber
2 10
1.8 Chemical Composition
Not Available
SiO2 · nH2O

Piemontite and Opal Chemical Formula

While comparing Piemontite and 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 Piemontite and Opal chemical formula.

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  • Chemical formula of Opal- SiO2 · nH2O

Piemontite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Piemontite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Piemontite and Opal Optical Properties during the identification of gemstone. Specific gravity of Piemontite is 1.98-2.25 whereas that of Opal is 1.98-2.25.