Most interesting! I have never heard of one before. Your rendition looks very authentic. Glad you happened across that bone. I imagine many passed it up not seeing any use for it.
I've got the kiln, not fired it up for a few years though and you definitely don't want to do it with a torch.
To slump glass takes anything up to 6 hours or more depending on size of the work piece to bring it up to the correct temperature for slumping followed by up to 24 hours slowly reducing the temperature back down to room temperature to reduce the risk of it shattering from cooling too fast.
I knew you worked with stained glass but I didn't realise you had a kiln Steve, guess something like the smoother in the picture above would take a lot of fuel, fuss and bother though?
Aye, I've still got a small electric kiln that I used to use to do a bit of simple flat glass slumping, dichroic glass jewelry and painted glass but as I said I've not used it for years now
If you mean the smoother in this picture then by the looks of it that was actually formed by someone who blows glass. They'll have taken a lump of molten glass out on a pontil, let it start to drip to form the teardrop shape then cut it off so it rested on a suitable flat surface then was placed in a kiln to cool slowly. Whilst I know the process unfortunately I don't have the necessary equipment to do it