I am 100% positive the material is Harrison County flint. This material is one of favorite materials. I used to find a lot of this material in the 1980's and 90's. Now not as common to find for me.
I think I find it more Harrison County material in certain areas.
I have had a number of relic pictured in Lars books, and was friends with him up till he passed.
One interesting aspect of Harrison County material is in the manner it patina's. In its natural state its a dark bluish or blackish color, hard to get the shading exact. I think the color is dependent on the minerals in the earth in the location it forms the large nodules and in the actual size of the nodules.
I have found Harrison County relic next to each other, at the same time, same hunt, were on is a dark blackish and the other within inches has a nice light chocolate patina. Or another time I found a relic where one side was the light chocolate patina and the other not hardly patina'ed at all. Possibly influenced by sunlight and ground minerals and the sun light rays, visible or invisible spectrum, having an influence on the patina formation.
Note the colors on this relic I found in 1989. The arrows point to the area where the natural stone color is seen.
The tip is a nick, the nick exposed the natural color when the patina was removed on the flake.
The other arrows point to an area where the relic, I am guessing picked up at a later date, had a spokeshave knapped into the edge.
Some may discount that spokeshave. Thats ok - its armchair authentication at that point. The spoke shave is an intentional knapped area - the middle arrow points to finer secondary knapping. If you zoom into the area under the rightmost arrow you can also make out additional knapping on the edge.
The main take away from this is the material patination.
?
. Good times. Always hard to find a nice archaic piece.
