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Zoisite
Zoisite

Howlite
Howlite



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Zoisite
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Howlite

Zoisite and Howlite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
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3.20-3.50
Uneven, Conchoidal, Even
Perfect {010} imperfect {100}
6-7
Ca2Al3(SiO4)3(OH)
 
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-
-
2.45-2.58
Conchoidal
None
3-3.5
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Zoisite and Howlite Chemical Formula

While comparing Zoisite 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 Zoisite and Howlite chemical formula.

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Zoisite and Howlite Specific Gravity

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