Preserved on a bed of "Tuning Fork" graptolites (Didymograptus murchisoni) is this undetermined cystoid. This is the first example we have ever seen from this location and what makes it more special is the graptolites around it. A fabulous and extremely rare fossil.
This material is now becoming fairly scarse and is well known throughout the world as it is a classic fossil. This thin slice has been ground gem smooth and a high polish applied. The colouration of this algae is due to Boron (Pink).
After a huge amount of hours of preparation to free this sponge from the surrounding chalk block, it is now presented as a stunning three dimensional sponge. The sponge is totally hollowed out and now appears as it would in its natural lifetime. A fantastic addition to any collection.