Villiaumite and Howlite Physical Properties

Villiaumite

Howlite

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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

2.792.45-2.58

1 7.18

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

{100} Perfect, {010} Perfect, {001} Perfect

None

1.7 Mohs Hardness

23-3.5

2 10

1.8 Chemical Composition

NaFUlrich Henn and Claudio C.

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

Villiaumite and Howlite Chemical Formula

While comparing Villiaumite and Howlite 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 Villiaumite and Howlite chemical formula.

Chemical formula of Villiaumite- NaFUlrich Henn and Claudio C.
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Gems Found in America

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Villiaumite and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Villiaumite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Villiaumite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Villiaumite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.