R Rodger d New Member Joined Jun 20, 2017 Messages 1 Jun 21, 2017 #1 I found this in northern ND. It's a smooth black rock that has 3 layers, first layer is smooth black and brittle, second layer is a very soft, almost powder rust red substance, inner layer seems to be metallic. Magnet test was negative. Attachments 1498047743842-1516350405.jpg 24.5 KB · Views: 236
I found this in northern ND. It's a smooth black rock that has 3 layers, first layer is smooth black and brittle, second layer is a very soft, almost powder rust red substance, inner layer seems to be metallic. Magnet test was negative.
J JOE319 Senior Member Joined Dec 21, 2015 Messages 292 Jun 21, 2017 #2 Could be any one of a variety of iron ore...Only one variety is magnetic...Magnetite
Tom_in_CA Elite Member Joined Dec 23, 2013 Messages 20,749 Jun 23, 2017 #3 looks like a question for a lapidary forum. Welcome to FMDF
metaladdict Elite Member Joined Mar 9, 2010 Messages 17,895 Location Northern Ca. Jun 23, 2017 #4 I can't see it.