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Crystal Opal
Crystal Opal

Howlite
Howlite



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Crystal Opal
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Howlite

Crystal Opal and Howlite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.97-2.22
Conchoidal
None
5.5-6.5
SiO 2 + H 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

Crystal Opal and Howlite Chemical Formula

While comparing Crystal Opal 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 Crystal Opal and Howlite chemical formula.

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Crystal Opal and Howlite Specific Gravity

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