I just got a bunch of seashells from a store near me that basically just buys and sells any small thing they can manage. They have a big basket of miscellaneous seashells for $0.25 each. The ones that I've managed to ID are all found in Florida, and the basket had plenty of white sand in there, so most likely these shells are found in Florida.

Shell 8 has a broken tip, it's not supposed to be that rounded. Shell 10 (big spiky one) is from a basket of shells I got at Hobby Lobby, so I have no idea where it's from.
I checked very closely, and shell 11 isn't painted. Those colors are natural. I don't have a view of the back because it didn't want to balance like that, but there's nothing interesting on that side. No differing patterns or anything.
Even just a confirmed general ID (whelk, cone, etc) is helpful, but I'd really like to have exact IDs so I can finish the index cards for my collection. I looked these guys up in the National Audobon Society shell guide, but it's possible that I missed them due to looking in the wrong section.

Shell 8 has a broken tip, it's not supposed to be that rounded. Shell 10 (big spiky one) is from a basket of shells I got at Hobby Lobby, so I have no idea where it's from.
I checked very closely, and shell 11 isn't painted. Those colors are natural. I don't have a view of the back because it didn't want to balance like that, but there's nothing interesting on that side. No differing patterns or anything.
Even just a confirmed general ID (whelk, cone, etc) is helpful, but I'd really like to have exact IDs so I can finish the index cards for my collection. I looked these guys up in the National Audobon Society shell guide, but it's possible that I missed them due to looking in the wrong section.