Jacobsite and Opal Physical Properties

Jacobsite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Not Available

1.4 Specific Gravity

4.76-5.031.98-2.25

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

None

1.7 Mohs Hardness

5.5-6.55-6.5

2 10

1.8 Chemical Composition

(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

SiO₂ · nH₂O

Jacobsite and Opal Chemical Formula

While comparing Jacobsite 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 Jacobsite and Opal chemical formula.

Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Opal- SiO₂ · nH₂O

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Jacobsite and Opal Specific Gravity

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