Dactyloceras Ammonite positive and negative.  Lovely detail.   
Can be picked up and displayed as a stone or in half.
Supplied with 2 small wooden stands so can be displayed apart or together.
Found and prepped by us at Fossilbox.
 
Approximate stand size 
5 cm diameter
1 cm high
 
Approimate ammonite size 6 cm 
 
Total display size 6 cm