Chalice is probably 4in x 3in and the half that fell on the enchinata is dead. I did a seachem reef dip after I found it. Any advice would be appreciated.
I would cut the dead part off and keep it in decent flow. It should be fine. Probably still in shock, if it wasn't too long ago, so I would cut it as soon as you can and it causes less stress.
I would cut it asap as well. A lot of times when chalices get stung a bacteria infection follows. Plus chalices will take longer to grow over its old skeleton.