I have found several of these and have gone back to harvest more for the sweet crystalspot.
The area also has cylindrical Stromatoporoid and favosite fossils. I also found two of these specimens with large (rare to me) bivalve or brachiopod species in the matrix. The base of which looks like a "C."
The critters are in a certain strata of the limestone road cut. They are quite distinct in appearance within the wall, due to the long, radiating spicules (I think that's what I'm seeing) and the darker color. Of course, some actually appear with their crystal structures exposed.
Thanks in advance for help with the ID.