Skip to page content
Hi found this on beach as tide was going out it's really heavy but have no idea what it is.
Looks like a marcasite nodule.
Specimens can show a range of habits; yours looks (in part) like the 'pine cone' one.
We had one on here only yesterday - http://www.nhm.ac.uk/natureplus/message/43979#43979
You can see your specimen better than I can; tell me what you think having done a bit of Googling.