Labelled Rhipidogorgia flabellum, the (historic) accompanying text describes it thus:
There is a link to my recent previous activity of documenting fossil Cnidaria as this soft coral is a member of the Cnidaria phylum.
The layer of grime was removed using gentle application of dry cleaning latex sponge and copious amounts of time (9 hours altogether – plenty of thinking time but hard not to drift off into a trance!). Although the structure looks delicate, it had a relatively plastic quality. Round the edges the exposed wiry core was needle sharp.