Howlite and Hollandite Physical Properties

Howlite

Hollandite

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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

2.45-2.585.05

1 7.18

1.5 Fracture

UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Brittle, Metallic

1.6 Cleavage

None

Distinct / Good, Prismatic

1.7 Mohs Hardness

3-3.54-6

2 10

1.8 Chemical Composition

Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Howlite and Hollandite Chemical Formula

While comparing Howlite 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 Howlite and Hollandite chemical formula.

Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

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Howlite and Hollandite Specific Gravity

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