From the Jurassic,Upper Sinemurian stage,Obtusum zone,Charmouth mudstone formation.
Collected from Black ven,Charmouth,Dorset,England.
An absolute cracker,a natural popped Asteroceras ammonite,on a cut base bed of grey Mudstone matrix ,all on his lonesome self,preserved in Honey Calcite ,and a further Promicroceras planicosta ammonite on the reverse.
The Asteroceras measures 25.2mm and the Promicroceras is 13mm
And including the matrix is 123mm x 152mm.