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Lazurite
Lazurite

Howlite
Howlite



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Lazurite
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Howlite

Lazurite and Howlite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
2.75
Uneven, Conchoidal
Imperfect on {110}
5.5
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
 
-
-
-
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

Lazurite and Howlite Chemical Formula

While comparing Lazurite 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 Lazurite and Howlite chemical formula.

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Lazurite and Howlite Specific Gravity

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