Another Unknown

[jonjunk]

This one came from an estate sale... with no information.

Any guesses? It has a beautiful golden sheen of pyrite.

[araucaria1959]

Please show pictures from the other side. I have a very similar specimen (Dactylioceras commune, also with pyrite, from the Lias epsilon of Whitby/England), but the surrounding material of my specimen is darker (dark grey).

It can help if you show the opposite side of the stone.

araucaria1959

[Kosmoceras]

Yes, that seems correct to me.

[jonjunk]

Thanks for the suggestion.

A few more photos.

[jacob]

I would say the same again, have you tried cracking open that nodule?

[araucaria1959]

Thank you for the new pics. Now it's plausible (even the colour of the sediment) as already mentioned:

Dactylioceras commune from Whitby/England. I bought a similar one more than 40 years ago!

araucaria1959