Pictured! Large 5 9/16" Knife - Hixton - found in Brookings Co., SD by Harlan Olson.

Large 5 9/16" Knife found in Eastern South Dakota made from Hixton Quartzite found in Brookings Co. South Dakota by Harlan Olson. From the collection of the late Harlan Olson. Published in “Rare and Unusual Indian Artifacts – Identification and Value Guide” Lar Hothem 2007 page 36.