My new obsession-chert in ROCKS, MINERALS and FOSSILS Posted December 2, 2019 20 hours ago, Bedrock Bob said: Blades can be made from little nodules like that. But they are not recognizable as a knapped tools. Most people see blades and assume they are debitage from knapping. And they see blade cores and know they are some type of artifact but can't figure out what. So my little flint stones that are broken in half, is that done my human or can the ocean have done it? Thanks by the way for all that information. I am still wrapping my head around it.