Pair or Promicroceras ammonites in two separate nodules. Calcite has a nice greenish tinge which is unusual. Both a good size (20-24mm).
Matrix on larger block - 11cm x 7cm. Smaller block - 7cm x 4cm
★ ★ Moderate. Relatively easy to clean. Harder rocks that might require and engraver or an air pen (air scribe).