A stunning example of an ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Charmouth, Dorset UK.
The piece of limestone matrix measures 103 mm (4.1 inches) across and the fossil ammonite measures 26 mm (1.05 of an inch) across. This is a classic "popped" stone, where the rock has been split to reveal both the positive cast of the shell and the negative impression. The two pieces fit back together and can be displayed separately or as a single piece with a surprise inside! The ammonite is very well preserved and has been prepared out of the rock to reveal the shell. The ribs are very finely defined, and the dark chocolate brown colour is beautiful. A great example of the species and impressive in the flesh. The fossil weighs 490 grams (both pieces combined) and has a cut flat base to allow it to stand freely on its own for display.
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.