I made a stained glass box the other day, and I sprued it up and cast it.
But it did not come out well The top edges didn't cast and the bottom was sprued wrong too.
The bottom in the picture is silver. The glass separated from the mould. I am doing another one this week. This time I think it should work.
The shells and stuff I injected from other moulds and stuck on. They all came out, but at the time I thought they would give me the most problems....You just never know the first time.