Springfield Thunderegg Rock Club Show & Sale This weekend is the Annual Rock Club sale at Willamalane Adult activity center, Sat 10-5, Sun 9-3. The club will have a huge selection of Rough Rock & slabs from several estates, mostly $1/lb. The Popular $10 Mystery Buckets of rock, grab bags, tumbled stones and a vast array of silent auction items. Kids games and activities with Free Admission. Including a 8" Highland Park lapidary combo cabochon machine with a 10" trim saw that's in great condition . Vendors are predominantly local club members with a vast array items. Club proceeds fund several local student scholarships.