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Howlite
Howlite

Feldspar
Feldspar



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Howlite
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Howlite and Feldspar Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.45-2.582.56-2.75
Amber
1 7.18
1.5 Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Conchoidal, Uneven, Conchoidal, Gemstones of the world (2001)
1.6 Cleavage
None
two or three
1.7 Mohs Hardness
3-3.56-6.5
Amber
2 10
1.8 Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Not Available

Howlite and Feldspar Chemical Formula

While comparing Howlite and Feldspar 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 Feldspar chemical formula.

  • Chemical formula of Howlite- Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
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Howlite and Feldspar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Howlite and Feldspar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Howlite and Feldspar Optical Properties during the identification of gemstone. Specific gravity of Howlite is 2.56-2.75 whereas that of Feldspar is 2.56-2.75.