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.
This exquisite and rare sponge has been preserved in Marcasite and glitters a golden colour. The detail througout the specimen is exceptional and would make a fantastic addition to any collection. Highly aesthetic.
Sadly, the quarries where this beautiful specimen was discovered are now overgrown/filled in or water logged. This specimen has been carefully prepared from its surrounding matrix and then ground gem smooth and a high polish applied to reveal beautiful white and green calcite. The specimen has a cut base and would make an ideal display item. Now becoming very scarse.
An absolute classic piece of "Beetroot stone" that has been sliced, ground and a gem polish applied to reveal the beautiful detailing of this Jurassic Stromatolite. The colour is exceptional as it is a deep, rich pink which is seldom seen. A high quality specimen.