Sapphire and Hollandite Physical Properties

Sapphire

Hollandite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.035.05

1 7.18

1.5 Fracture

Uneven, Uneven, Gems, Sixth Edition (2006)

Brittle, Metallic

1.6 Cleavage

None, but may exhibit parting

Distinct / Good, Prismatic

1.7 Mohs Hardness

94-6

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Sapphire and Hollandite Chemical Formula

While comparing Sapphire 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 Sapphire and Hollandite chemical formula.

Chemical formula of Sapphire- Al ₂ O ₃
Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

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Sapphire and Hollandite Specific Gravity

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