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Crystal Opal
Crystal Opal
☒

Analcime
Analcime
☒



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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.
 
-
-
-
2.24-2.29
Uneven, Subconchoidal, Conchoidal
Very poor [100]
5-5.5
NaAlSi 2O 6 · H 2OMichael O’Donoghue , Gems, Sixth edition (2006) More from other references

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