Tool marks

This may sound like a dumb question. So far I have been assuming, I want to KNOW. Are these the tool marks I’m looking for?

Boy did I pick the wrong pictures

I have similar etchings on cortex shown on your pebble find, i cannot see the crystal in 3d and you have not marked what you suspect to be flake removals so I cannot tell.

I’m sorry. As you can tell I’m new at this. I’ve been collecting them for years but this is the first time I got to share them with someone knowledgeable. The pebble is 4”x 2 1/2”

Im not sure with the other pics but the first one parallel markings are circled, they seem to be individual 'scratches' I would suggest that is agency as you believe. Be aware though that I find chalk on my find site with parallel scratches most likely caused by digging badgers, and some natural effects do cause parallel features....

Thanks so much for your help. It’s hard for me to get good pictures that show the marks, but I’m working on it. Your forum is awesome! I finally found a place where people can see what I see. Artifact sites until now have made me doubt my sanity, denying the validity of rock Art and attributing it to “a good imagination “. There are none so blind as those who will not see. Thanks again!

Excellently put, thank you.

That's why I love this forum!