This is the end of cane skull component from the Bertha image, and YES, I AM pretty dang proud of the name I came up with for this one, ha ha! It was rounded with the sphere grinder, giving us some fascinating glass viewing. There are some rough spots on the backside where the glass didn't fill the resultant sphere, seen in the 4th pic, but it's a neat effect that I think makes it interesting actually. And goes along well with the deathly theme of the marble...