A link to a seller site that the guy id's the same material as banded yellow-tan and gray striped Tiger chert . 7th artifact down, this piece found in Sweetwater, WY http://www.westernartifacts.com/flinttools.htm
actually i just found a stemmed lance midsection made of same material, "possibly cody complex" ill post a pic up if i can ever get a camera
Thanks again steve, very misterious material......... i wonder if there is a quarry of it here in the usa, or if its just spread out everywhere, i have found no nodules of this, just what has been used and worked, so im thinking my area guys brought it in. i still would live to find out tho!