Friedelite and Common Opal Physical Properties

Friedelite

Common Opal

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.06-3.191.98-2.50

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009) Tough, UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

{010} Perfect

Not Available

1.7 Mohs Hardness

4-55.5-6.5

2 10

1.8 Chemical Composition

Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.

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

Friedelite and Common Opal Chemical Formula

While comparing Friedelite 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 Friedelite and Common Opal chemical formula.

Chemical formula of Friedelite- Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

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Friedelite Vs Hibonite

Friedelite Vs Imperial Topaz

Friedelite and Common Opal Specific Gravity

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