Opal and Hollandite Physical Properties

Opal

Hollandite

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1 Physical Properties

1.1 Tenacity

BrittleWalter Schumann

Not Available

1.2 Solubility

hot salt water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.98-2.255.05

1 7.18

1.5 Fracture

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

Brittle, Metallic

1.6 Cleavage

None

Distinct / Good, Prismatic

1.7 Mohs Hardness

5-6.54-6

2 10

1.8 Chemical Composition

SiO₂ · nH₂O

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

Opal and Hollandite Chemical Formula

While comparing Opal and Hollandite 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 Opal and Hollandite chemical formula.

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

Compare Semi Precious Gemstones

Opal Vs Lehsunia

Opal Vs Amethyst

Opal Vs Alexandrite

Opal and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Opal is 5.05 whereas that of Hollandite is 5.05.