Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil natural pink crystal a form of gypsum crystal

a form of gypsum crystal also known as Satin Spur and in fine grain form Alabaster

Rare Earth Element Bearing Mineral Bastnasite

giving each piece a one-of-a-kind appearance

How to Use Add these mini chips to your crystal grids for clarity and calm

resilience

Promicroceras planicosta (Reynès, 1879) – Calcite Ammonite Fossil natural pink crystal a form of gypsum crystalA 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