seed ID

[galina]

If it was from the Seed Circle, I think you took part in the extra parcel? Here's a list of what it contained, perhaps it will help narrow down the options.

you can rule out mine, because all mine were in paper baggies, not in plastic.

[galina]

[brown thumb]

 I googled Cerithe major  and found a photo of an adult plant same or very close leaf shape and the leaf pattern
was the same but mine has a smooth leaf edge but  in the photo the leaf was serrated, so thinking may be mine will develop as the plant  gets older