![Local Rock Collector Finds Rare Gem in Benton County Field [VIDEO]](http://townsquare.media/site/67/files/2014/04/Lyndon-Johnson.png?w=980&q=75)
Local Rock Collector Finds Rare Gem in Benton County Field [VIDEO]
Sauk Rapids native Lyndon Johnson is no stranger when it comes to rocks. For 21 years Johnson has found anything from agates, fossils and gems in the farm fields of Central Minnesota to add to his collection.