Pilot Knob Mine, Pilot Knob, Iron Co., Missouri

9.8 x 6 x 4 cm
The average width of the fin like structures is approximately 0.7. cm
3.9 x 2.4 x 1.6 in

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Mine was active from 1968 to 1980.

A thin, fin like shaped specimen composed of connected Pyrite crystals that appears to be a pseudomorph of some kind. There are additional fin like structures extending out from the sides. The Pyrite crystals have a good metallic luster on one side. On the other side, there is an overlayer of gray material covering much of the specimen; although, there are also still quite a number of crystals faces with a high luster. The specimen can be stood on one end, but at an angle. In fact, the specimen was ground down flat in one area to accommodate this. There was also old, rubbery, discolored glue on this area, most of which I was able to pick off.

Condition: Good

Flaws: There are places where the edges of the fin like structure end in broken or contact surfaces.

This mineral is also found in the following galleries: Minerals From the United States | Sulfides and Sulfosalts | Minerals Priced Between 50 and 99 Dollars