"Meteor-wrongs":  Page 2.

FERROCHROMANGANESE:  This is one of the most commonly misidentified 'meteorites' in Oregon.  Ferrochromanaganese is an artificial alloy made in the making of steel.  On the upper left is a typical sample of ferrochromanganese, showing a dark oxidized surface.  If you look closely, you can see shiny edges where the oxidized coating has been removed by abrasion.  The image in the upper right is of a sample which has been broken open, exposing the interior.  The interior is shiny, silver, and has a granular texture that has been described as "sugary". Another diagnostic feature of this material is the presence of tiny holes or vesicles.  Such vesicles are almost never found in meteorites.
 

---

VOLCANIC ROCKS: One problem with finding meteorites in the Pacific Northwest is the abundance of dark-colored volcanic rocks.  The picture on the left shows a vesicular basalt, while the picture on the right shows scoria (light-weight volcanic cinder).  Many basalts lack vesicles and are simply solid dark rocks.