I'm not seeing any holystone recipe or block in JEI. Is holystone not yet implemented in this version of Chisel or am I missing something?

Removed, use Marble/Quartz (Quartz coming in a future update) Chiseled Cobblestone as a replacement. Chiseled Cobblestone looks nearly identical.

If lots of people ask, we're release a Chisel blockpack in the future re-adding all of the legacy blocks.