It looks like a cephalopod, probably an ammonoid

The gold like appearance confirms that it’s pyrite. Pyrite is the fool’s gold!!!

Photo is a bit out of focus but it looks like a bivalve

It’s more like vesicular basalt

It’s a coral. Genus cf. Zaphrentis!

It’s quartz. Seems to have precipitated from water that was trapped in the cavity. The shape of the crystal is typical of quartz. Moreover if you see carefully you will find comb like structure on the wall of cavity which is is typical of quartz!!!

The Gastropod shell is of Conus, a loosely coiled shell.

It’s a beautiful sample of a regular Echinoid!!!

A cephalopod fossil. It’s an ammonoid but to name it some more pics required

Looks like Productus!!

It’s a part of an ammonoid!