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Caledonite
Caledonite

Howlite
Howlite



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Caledonite
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Howlite

Caledonite and Howlite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
5.6-5.76
Uneven
[001] perfect; [100] distinct
2.5-3
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
 
-
-
-
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

Caledonite and Howlite Chemical Formula

While comparing Caledonite 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 Caledonite and Howlite chemical formula.

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Caledonite and Howlite Specific Gravity

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