Willow Creek Jasper forms in the center of huge thundereggs. Only a small percentage contain good cutting material, but the good ones are spectacular, fine grained and take a great polish. It is mined just north of Eagle, Idaho. Total length – 75 mm x 38 mm (3″ x 1.3″). Weight – 31.52 grams. Lapidary and design work by John Delong.