Obsidian occurance, Milford, Beaver Co., Utah, USA
List of minerals arranged by Dana 8th Edition classification
|Group 75 - TECTOSILICATES Si Tetrahedral Frameworks|
|Si Tetrahedral Frameworks - SiO2 with  coordinated Si|
2 entries listed. 1 valid mineral.
Kapple, William: Rockhounding Utah.
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Locality Updated: Wheal Liberty, Mithian, St Agnes, St Agnes District, Cornwall, England, UKFrom Peter Haas, 31st Aug 2014 01:33:53