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Four specimens.  Top Left, small Promicroceras approx. 15mm diam, filled with white/clear calcite.  Top right, Dactylioceras commune from the Yorkshire coast, around 70mm diameter.  Bottom left, What looks like a very nice white calcite Promicroceras about 25mm diam.  Should also be an easy one to prepare.  Bottom right, a piece of popcorn stone (100mm X 65mm).  Contains many small ammonites.  Will be mainly Promicroceras but also can contain Cymbites, Microderoceras and Caenisites.  Some ammonites also on the reverse of this piece.

Moderate Difficulty. 

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