|Max Vein Size||N/A|
|Max Spawn Height||N/A|
The Onyx Furnace should smelt any item that can be processed by a normal furnace.
Item duplication will not cause more items than the output item's stack size to appear. If the stack size limit is reached, smelting stops until the output slot is partially or completely emptied.
The standard chance for duplication is 30%. This can be adjusted in the config files. Currently, due to a quirk in the Onyx Furnace code, the chance for duplication will only occur if the output slot is not empty. If the output slot is empty (this occurs if using Hoppers), the item will smelt normally with no chance of duplication. Due to this, it is best to clear the output slot infrequently. A recomendation is to use right-click to pick up half the output stack while smelting is ongoing, otherwise the next item to be smelted does not have a chance to be duplicated.