Making stone tools out of raw obsidian breaks the rind and starts the obsidian clock counting.
Excavation turns up a surprise
Obsidian cores and blades were traded great distances inland from the coast. Is this an authentic American Indian arrowhead? Using these sites together in researching your arrowhead will work best. Cambridge University Press. Things to consider when identifying Native American Indian arrowheads Location Where you found your arrowhead will play a very critical role in starting to identify it.