Exceptionnelle ammonite iridescente à surface mate Exceptional Iridescent Ammonite with Aesthetic Matte Finish Placenticeras meeki Upper Cretaceous Bear Paw, St. Mary's River, Alberta, Canada Ammonite fossils are found on every continent. Treasured for their appearance and form, some show intricate suture patterns, which are created by the complex walls dividing the inside of the shells. Those from Southern Alberta, however, display remarkably brilliant colors not seen in ammonites from other localities. Coveted by collectors the world over, their stunning palettes fortuitously result from the light interference by the shell layers. The present breathtaking example, of considerable size, exhibits a dazzling, luminous red color predominating, with vivid emerald-green throughout. Flashes of yellow and red-orange are also seen in this magnificent specimen, which, unlike most specimens of its kind, is equally stunning on both sides. This particular specimen has been treated with a matte coating, giving it a more natural and soft finish, a new preparation technique not yet seen before. Weighing 24.4 kilograms. Height 45 cm For further information on this lot please visit Bonhams.com