A man talks about the properties of different stones and rubs two together.
A man gives instructions and then tries to a bend a rock and files it with another rock.
A man holds a piece of stone he is shaping, and rubs it with another stone
A person is holding a thin, colored stone and using another stone to shave pieces off.
A person is sitting down chipping away at two rock and letting debris fall in a towel
A person was sliding rocks against each other to smooth the edge
A man shows a stone arrowhead and its properties of flexibility.
A man is holding up a orange colored stone and carving it with another stone.
A man finishes sharpening an arrowhead he has made by hand.
A man holding a stone on his hand as he converses then rubs it suing another stone