I have been gradually splitting the concretions that I collected this May with the ESCONI. I have not found anything earth shattering, but it is addictive. I go down to the freezer each day or two and see what is ready to open. The first three photos are from a 5 cm flat/oval concretion , and the last is from a small 1.2 cm circular concretion I am quessing that these are cnidarians, but any and all help will be well appreciated.