Posted: Mar 08, 2010 7:14 pm
The_Piper, should have made it clear. your op had two pix that looked like they had ferrous content. the second set you posted has what looks like ammonite on its underside (second pic).
Lifeboat for the rational mind :D
http://www.rationalskepticism.org/
http://www.rationalskepticism.org/viewtopic.php?p=36322#p36322