“... The Radford mine is one of the oldest claims in the Ochocos. All that remains of this claim are the tailings from the operation. The eggs from here closely resemble the Priday eggs, and many are sold under that name. The matrix inside the eggs usually has more of a flesh color intermixed with the brown, which can help to identify them. The agate within generally tends to be dark, ranging from black to blue, and can have banding or mossy inclusions. This claim is open to the public. Update 2009- this is now a private claim, the owner lives back east...”

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