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Apophyllite
Apophyllite

Howlite
Howlite



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Apophyllite
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Howlite

Apophyllite and Howlite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.30-2.50
Uneven
Perfect on (001)
4.5-5
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich 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

Apophyllite and Howlite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Howlite chemical formula.

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Apophyllite and Howlite Specific Gravity

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