A stunning example of a calcite ammonite fossil of the species Asteroceras obtusum from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The piece of limestone matrix measures 158 mm (6.2 inches) across and the fossil ammonite measures 76 mm (3 inches) across. The ammonite is very well preserved and has been prepared out of the rock on both sides to reveal the whole shell including the distinctive ribbed keel.
The ribs are very finely defined, and the colour is a beautiful mix yellow and light brown. There are also two other smaller ammonites in the matrix - a juvenile Asteroceras and a large Xipheroceras.
The large ammonite has been prepared on both sides so that when a light source is placed behind it, the shell glows due to the translucent crystalline structure.
The matrix has had some repair work done as it split when the fossil was found but this did not affect the ammonites.
A great example of a popular species and impressive in the flesh. The fossil weighs 1940 grams and a cut flat base to allow it to stand freely on its own for display. Fossils like this make great display pieces and add a real focal interest to any shelf, not to mention being a great conversation piece!
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.