Out of This World II Tuesday, 18 April 2023, 4pm

964* IRIDESCENT AMMONITE Placenticeras costatum Late Cretaceous, Maastrichtian, circa 71 million years Bearpaw Formation, Alberta, Canada Mounted on a custom steel stand 63 × 56 cm (without stand) Ammonite is an organic gemstone known for its exquisite iridescence and unique origins. This nearly 32-centimetre-large example exhibits remarkably colourful iridescence, consisting of vivid patterns of red, orange, yellow, green and blue, and is in a grey shale matrix. This is a truly exceptional ammonite specimen as demonstrated by the diversity of colours, intensity of iridescence, size, and quality of preservation. CHF 25 000 / 35 000 (€ 25 000 / 35 000) | 65