Measurements: 90 x 70 x 08 mm
Description: A peculiar growth habit of pyrite, with the descriptive name of "pyrite sun" or "miners' dollar". It is found in the coal mines of Sparta (Illinois) about 61 - 76 m below the surface.
There appears to be some other mineral that partially covers it, but when turned in light, the pyrite bits reflect the light.
Some of the edges are damaged and there are a few very narrow cracks, mostly near the base.
Weight of Specimen: 132 g
Chemical Composition: FeS2 (pyrite)
Hardness on Mohs Scale: (pyrite) 6 - 6.5Location:
Specimen Code: OTH 003