A gold ingot is made at the smelting crafting table, using the smelting skill
Gold Ore 4
Chunk of Coal 1
Coal can be bought from the crafting supplies NPC
Chunk of coal 6
Gold Ore 49 – 60
If Gold ore costs 52 for Gold ore and 6 for the Chunk of Coal, a Gold Ingot will cost 214 gold coins to make.
This does not include failures.