Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil crystal bracelet display Amethyst - Stone of Peace

Amethyst - Stone of Peace and Bella's favorite Colour

and connection to Earth’s natural history

balancing energy

Provide grounding and energetic stability

these phases symbolise beginnings

Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil crystal bracelet display Amethyst - Stone of PeaceA 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