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Ulugei, Dornogovi Aimag, Mongolia

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List of minerals arranged by Dana 8th Edition classification

Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO₂ with H₂O and organics
Opal	75.2.1.1	SiO₂ · nH₂O
Unclassified Minerals
var: Wood Opal	-	SiO₂ · nH₂O
'Petrified Wood'	-

3 entries listed. 2 valid minerals.

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Current server date and time: 8th Dec 2011 21:56:41