Didymoceras nebrascenense Late Cretaceous Pierre Shale Formation, Southwestern South Dakota Because these uncommon specimens cannot be commercially collected (and are only rarely found by excavators as shale nodules are opened in the search for more common fossils) Didymoceras specimens are perhaps the most desired ammonites in the world. The bizarre shapes of the coprolitic heteromorph (meaning loosely coiled) ammonites have inspired the imaginations of ammonite collectors the world over. This excellent 70-million-year-old example has been painstakingly freed from its surrounding rock matrix revealing a dark honey to pearlized white iridescent shell. 90% original with restoration to the top coil. Diameter measures 5 x 4 1/4in
Didymoceras nebrascenense Late Cretaceous Pierre Shale Formation, Southwestern South Dakota Because these uncommon specimens cannot be commercially collected (and are only rarely found by excavators as shale nodules are opened in the search for more common fossils) Didymoceras specimens are perhaps the most desired ammonites in the world. The bizarre shapes of the coprolitic heteromorph (meaning loosely coiled) ammonites have inspired the imaginations of ammonite collectors the world over. This excellent 70-million-year-old example has been painstakingly freed from its surrounding rock matrix revealing a dark honey to pearlized white iridescent shell. 90% original with restoration to the top coil. Diameter measures 5 x 4 1/4in
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
