On one face the knapping scars are angle flaked, medial ridge to edge--and as it customary the reverse is pressure flaked in a more random pattern on one blade edge, some more of the diagonal (transverse) chipping on the opposite blade edge. The work Benton--Elk River knappers was some of the best workmanship of the entire Mid Archaic period. The point is either Hornstone or Sonora--in one light you see more of the greys of Hornstone, but there is a reddish hematite coloration of Sonora Flint in natural spectrum lights (I always recommend ANY collector but an Ott Lite). The big knife is close to 3&1/16" from tip to flat base--the blade isn't snap base, but was knapped to the very edge of the starting flint preform/ flake. Color bands and a partial bullseye show along the blade. The piece was Warrick County, Indiana, found decades back, long in storage--every possible detail is lifetime guaranteed authentic. Shipping is $8.00, with checks or M.O.s welcomed. Sorry, I do not use paypal--Roy A.