A set of lifting tongs to hold the crucible, gently but firmly as you lift it out of the furnace.
A casting flask, and a simple pair of tongs for moving hot things, or feeding the stock into the crucible.
A furnace to melt it in.
The furnace is almost straight out of Gingery's book. Sand and Fire clay for the lining. The lid is fire-cement and Perlite. It was easier to get it to stay together. The Fire clay and sand was quite fragile for a lid.