... This claim is owned by Kop Kopcinski and his wife, Cindy. This mine has been in operation since at least the 1940’s and tons of great material has come from here. There are agates of all colors from white to black, with waterlines, fortifications, moss, plumes and tubes, as well as partially filled geodes with tubes of agate running through them. There is a fee for digging, but at $1.00 per pound, it is certainly reasonable. More info, pictures and directions are available at www.luckystrikemine.net...”

 extract of the article from Mark Ketsdever, Hillsboro, Oregon, 2007 :”Thunderegg Agates of the Ochoco Mountains, Oregon, USA”