Wulfenite and Howlite Physical Properties

Wulfenite

Howlite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.50-7.002.45-2.58

1 7.18

1.5 Fracture

Irregular, Brittle, Conchoidal

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

1.6 Cleavage

On {011}, distinct; on {001}, {013}, indistinct

None

1.7 Mohs Hardness

33-3.5

2 10

1.8 Chemical Composition

PbMoO 4Walter Schumann , Gemstones of the world (2001)

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

Wulfenite and Howlite Chemical Formula

While comparing Wulfenite 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 Wulfenite and Howlite chemical formula.

Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)
Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Wulfenite and Howlite Specific Gravity

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