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One Promicroceras in a partial small nodule.  A bump on the other edge of the nodule at the same level might (not guaranteed!) be another ammonite of similar size.

A second piece of nodule containing another Promicroceras with a small section of iridescence.  This is a small section of the ammonites original shell and is very uncommon.  This iridescence will not stand brushing or air-abrasive.  The colour will also be lost if you try to protect it with varnish or another type of coating. 

The third piece is a small section of Turneri zone, Promicroceras bed.  Several ammonites are exposed and when prepared it should show around half a dozen specimens.  All are small as is usual in this bed (10-15mm). 

Moderate Difficulty. Scale in photo.

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