I broke one too-large piece of it up with an almighty sledge-hammer blow and was startled to find that it hosted several instances of a natural cross. This remarkable, rare egg that I carved from it needs no further description. Oh, yes, I carved and cast the ‘egg-cup’ from bronze. It is a fine little piece of artwork in itself.
Finally, I’m happy to report that a collector spoke for it an hour after I posted the advisory. Yayy!