The item in the first photo is a flint fishhook. They show up with some frequency on all the artifact forums and experienced collectors will tell you none has ever been found in a controlled dig, or in context. Collectors universally regard them as modern. Native American fishhooks were made of bone, one piece or sometimes two. The subject gets debated a lot on the boards, but the consensus is that flint fishhooks are not ancient artifacts. Sorry for that bit of bad news.
Regarding the other items, My eyes are telling me modern for those as well, but it's tough to qualify, just decades of looking at artifacts renders a gut feeling, which isn't much to go by, especially from photos alone. And it's just an opinion.
In the case of the fishhook, though, the consensus in the collecting community is that they are modern.