Hi, @jonelle-forbes – Hope you don’t mind that I moved your post into the ‘What Is It’ forum. Do you have any further information you could share about these finds (city/state info, did you find any of these on the beach, etc.)?
Your second picture appears to have mostly modern invertebrate shells and coral pieces. The specimens at the top of that picture might be fossilized, but I’d need individual pictures (with something for scale — do you have a penny?).
Yes, I agree with Eleanor that a little more information on the site location might be helpful. I do see a number of different gastropods, tube worm castings, a turitella, and coral. I am not well versed in minerals, but some of the stones just look like river stones to me.