Leaverite

Leaverite is a slang term used by geologists, minerologists, and amateur rock collectors to identify a specimen in the field that may look interesting but is actually not. Rocks identified as such should be left "in situ", as they are not worth the hassle of transportation or deserving of a place in a respectable collection.

The term 'leaverite' derives from the phrase 'leave it right there'.

Specimens of even lesser interest are considered trashite.