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Howlite and Nepheline Physical Properties


Nepheline and Howlite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.45-2.58   
2.55-2.65   

Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal   
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   

Cleavage
None   
[1010] Poor   

Mohs Hardness
3-3.5   
5-6   

Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.   

Optical Properties >>
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Howlite and Nepheline Chemical Formula

While comparing Howlite and Nepheline 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 Nepheline chemical formula.

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Howlite and Nepheline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Nepheline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Nepheline Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.55-2.65 whereas that of Nepheline is 2.55-2.65.

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