An anchor cast in ancient times glows eerily!

As I started to chip off the  plaster I realized that the process was  similar to excavating on an archaeological dig so decided to leave some of it.  When I mocked up it being lit from underneath I removed some more.  I was pretty happy with the results that came from where the mold had cracked and allowed some of the glass to flow though.  It left some interesting marks.  I wanted to leave some on because when the work is exhibited it will  look like I've just dug it up.  I might even do some excavating while I'm there.  The work somehow needs somebody interacting with it.  The fake floor gives the appearance of a stage.  Unfortunately the large sheet of painted glass broke in the kiln so I'm trying to work out how to still use it.  I was going to chuck it but I don't like the waste.  Perhaps I'll fuse it back together or I'll make a feature out of the crack that has developed.  I like to work in this way as more often than not the accidents that happen improve the quality of the work, so just have to work out alternative ways of fixing without wasting anything.