| OSUMULITE, McKenzie Pass, Oregon, 8 x 7 x 5 cm | |
 | ex Gil Griffin collection, Here is the rare mineral Osumulite. It is the small black crystals that are about 1 mm in the vesicles of this volcanic rock. There are Osumulite crystals occurring throughout the vesicles covering both sides and probably in the middle of the specimen. They are not localized to one or two vesicles. |
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