A Pyrite Disc, also called "Miners Dollar" from a coal mine in Sparta, Illinois.<br><p>Size: 140 mm x 110 mm x 7 mm<br></p>
Weight: 246 gr
<a href="//commons.wikimedia.org/wiki/User:Cccefalon" title="User:Cccefalon">CEphoto, Uwe Aranas</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>