Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil crystal bracelet display and heart-based jewellery pieces

and heart-based jewellery pieces

making every piece unique

these phases symbolise beginnings

and irrational mood swings

Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil crystal bracelet display and heart-based jewellery piecesA beautifully preserved specimen of Promicroceras planicosta, fully replaced by calcite. This ammonite displays fine ribbing and its characteristic planispiral coiling. As a key index fossil of the Lower Jurassic Sinemurian, Promicroceras is highly significant for ammonite biostratigraphy in the UK. An excellent choice for collectors, researchers, or curated display. Stratigraphic Context Lower Lias Group, Obtusum Zone Chronostratigraphy Lower