Identification of items found with coins

[Localfisher]

Hay Guys, hope everyone is good. A bit off topic here but recently I have found several Constantine Coins, please see the first picture.
The reason for my post is because whilst extracting the coins from the ground, i have come across these items, which ive kept to research, they may be nothing, or could be something.
Does anyone know what these items could be....?

Picture 2 could be pottery, it has a grey core and is coarse to touch.
Picture 3 i first thought might be samian ware but now im not convinced
Picture 4 are odd items, the biggest one may be a stone
Picture 5 have got to be Roman nails, right?
Picture 6 has got to be pottery, it has that sound to it, and im
Sure i can see pottery like lines on the pieces.

Any information would be great, sorry if i am off topic, remove if needed.

Look forward to any help and replies.

All the best

Localfisher

[Victor]

the coins were probably originally in some sort of container, either something like a purse or some sort of pot, which could explain the broken pottery bits.

as far as the assorted metal bits, they could be bits of nails (maybe hob nails), except for the long one at the bottom.

[Localfisher]

Cheers Victor, im still trying to clarify the identity of these possible pottery sherds. I shall be meeting with the museum at some point to help with jt