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Howlite and Bustamite Physical Properties


Bustamite and Howlite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Partly soluble in HCl.   

Durability
Not Available   
Not Available   

Specific Gravity
2.45-2.58   
3.32-3.43   

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

Cleavage
None   
{100} perfect; {110} and {1 1 0} good; {010} poor   

Mohs Hardness
3-3.5   
5.5-6   

Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   
(Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Howlite and Bustamite Chemical Formula

While comparing Howlite and Bustamite 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 Bustamite chemical formula.

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Howlite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Howlite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.

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