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.
Preserved on a block of chalk is this beautiful specimen. The specimen has been carefully prepared using air abrasive techniques to reveal the fine ornamentation on the shell as well as the delicate long spines. There are modern forms of Spondilus "Spiny Oysters" that still exist today. A very aesthetic and fine specimen.
This lovely specimen is complete and has good detail throughout. Wrens Nest is a world classic Silurian fossil locality which is approximately 410 million years old. A very good study fossil for the collector.