Groutite, Petrified Wood
Blackwater Mine, Yazzie Mesa, Cane Valley Mining District, Apache County, Arizona, USA
9.5 x 4.8 x 4.0 cm. Groutite is a rare manganese oxide. Lustrous needles of groutite, to 3 mm, are richly scattered on the crest of both sides of the banded, quartz-replaced petrified wood. I have seen just a few specimens of this material before - this is rare, hard to obtain material. This sculptural, very large specimen for the species is from ...
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