A stunning example of an ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Charmouth, Dorset UK.
The main piece of limestone matrix measures 142 mm (5.62 inches) across and the fossil ammonite measures 31 mm (1.2 inches) across, which is large for this species. 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, although part of the inner whorl is missing and the outer whorl split when the rock was opened and has been repaired. The ribs are very finely defined, and the mottled brown and yellow colours are beautiful. A great example of the species and impressive in the flesh. The fossil weighs 260 grams (both pieces combined).
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.