Bernalite, Goethite

Specimen ID: FCR-W79

Bernalite : Fe(OH)3·nH2O (n = 0.0 to 0.25)
Goethite : α-Fe3+O(OH)
Mindat locality:

Photo added to

Dark bottle green Bernalite crystal aggregates on mamillary Goethite. Picture width 3 mm. Collection and Photograph Richard Bayerl. The Clara mine is the second world occurrence of this rare and unusual mineral.
Richard Bayerl - 15th February 2006
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