A lovely example of this burrowing shipworm which is approximately 50 million years old. The specimen exhibits a thin slice which is packed both sides, ground gem smooth and finally polished to reveal excellent detail. Very nice study fossil for the collector.
This very high quality specimen has been preserved in solid calcite and lies in a generous piece of Oolithic matrix which has a cut base for display options. Approximately 167 million years old. A nice collector's piece.
From the classic hunting ground for these cretaceous sponges, comes this fine example. This specimen was collected last century and has been carefully removed from a large block of chalk. The specimen is totally matrix free and is highly three dimensional. Most examples of these seldom come onto the open market as they are rare and really only seen in museum collections.
