Hollandite and Opal Physical Properties

Hollandite

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

5.051.98-2.25

1 7.18

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

Distinct / Good, Prismatic

None

1.7 Mohs Hardness

4-65-6.5

2 10

1.8 Chemical Composition

Ba(Mn++++,Mn++)8O16

SiO₂ · nH₂O

Hollandite and Opal Chemical Formula

While comparing Hollandite 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 Hollandite and Opal chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Opal- SiO₂ · nH₂O

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Hollandite Vs Larvikite

Hollandite and Opal Specific Gravity

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