Multiple Iridescent Ammonite Plate
Caloceras johnstoni
Jurassic
Lower Lias Beds, Somerset, England
Representing an ammonite genus not commonly seen at auction, several Calloceras specimens display a lovely red and green sheen. The detail of the ammonites is excellent, displaying fine definition of the inner rings. The ammonites are preserved in a large plate of black matrix. Measures 9 3/4 x 13in