With that really long stem I keep wanting to label this as a "Hardin variant", but the lack of basal edge grinding suggests a Late Archaic Period origin here in the S.W. corner of Indiana--somewhere around Evansville, that's all the auctioneer would tell me--the tan chert (or Jasper) is what you typically find along the Ohio River, washed downstream from Pennsylvania sources--"Vera Cruz" I think is the variety. Alternatively is usually gets labeled as "Glacial wash"...something the melting glaciers carried downstream. Length is 2&13./16" by 1&1/16"--the medial ridge is close to 3/8", so it was a strong knife, not something easily broken by being made too thin. That tip is just needle-like. The unusually long stem shows minor dulling of the edges (just not the basal edge itself)--not quite 'grinding', but the 2500--3,000BP maker didn't want sinew cut-through by the sharp edges of the stem. Now, why is the stem so long? Wish I had an answer, that's a feature (along with the extruded tip) that only the ancient maker could answer, neat piece, REAL--Roy A.