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Howlite
Howlite

Sellaite
Sellaite



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Howlite
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Sellaite

Howlite and Sellaite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
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
 
Brittle
-
-
3.14-3.16
Conchoidal
Perfect on {010} and {110}
5-5.5
MgF 2Ulrich Henn and Claudio C.

Howlite and Sellaite Chemical Formula

While comparing Howlite and Sellaite 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 Sellaite chemical formula.

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Howlite and Sellaite Specific Gravity

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