Preserved in a large rectangular block of chalk is this stunning and rare example of this cretaceous chalk sponge. The sponge has been expertly prepared. Examples like this are very seldom seen for sale as most of them end up in museum collections. This is a particularly fine and extremely sought after specimen.
A fantastic Eocene Bivalve with both valves intact and in life position. The specimen also has the hinges preserved which is an uncommon feature with this classic fossil clam shell. An important addition for the serious collector. Approximately 42 million years old.