Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil grounding and protective stone Known for its calming and

Known for its calming and nurturing energy

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Black Spinel is known for its grounding and revitalising properties

Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil grounding and protective stone Known for its calming andA 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