"Popped" Asteroceras obtusum ammonite fossil (68 mm) pyrite both the positive shell and

both the positive shell and cast in the matrix were revealed

These are the most sought-after colours in these fossils and this example is as good as they get

96 inches) across

The piece of limestone matrix measures 146 mm (5

These large Crucilobiceras ammonites are uncommon as most are much smaller and they don't get much bigger of better than this

"Popped" Asteroceras obtusum ammonite fossil (68 mm) pyrite both the positive shell andA 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 ammonite sits inside the original piece of limestone matrix in which it was found, that has been split open to reveal both the positive and negative parts of the shell. The main piece of matrix measures 165 mm (6. 5 inches) across and the fossil ammonite measures 68 mm (2. 72 inches) across. The