A stunning example of an ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Charmouth, Dorset UK.
The ammonite, which measures 25 mm (0.96 inches) across, sits in one of two pieces of limestone matrix, the larger of which measure 85 mm (3.35 inches) tall. 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 shape of the pieces of rock make them great display pieces. The body chamber of the ammonite is also split, revealing the beautiful internal "dog's tooth" calcite crystals.
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 mix of mottled brown colours is beautiful. A great example of the species and impressive in the flesh. The combined weight of the two pieces is 550 grams and both have a cut flat bases to allow them to stand freely on their own for display.
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.