A stunning example of an ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The piece of limestone matrix measures 105 mm (4.1 inches) across and the fossil ammonite measures 30 mm (1.2 inches) across. The ammonite is very well preserved and has been prepared out of the rock to reveal the whole shell. The ribs are very finely defined, and the pale yellow colour is beautiful. This one is preserved as both the positive fossil and the negative impression, which fit back together. A great example of the species and impressive in the flesh. The fossil weighs 225 grams when put back together and has cut flat bases to allow both pieces to stand freely for display.
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.