Budget Induction Smelting

I've been wanting to try and melt what I think is gold powder down into a button for a while. I've been messing with using some parts from eBay to make a cheap induction furnace.

Parts:

The ZVS board won't start until it detects something ferrous enter the induction coil. If the item is too big it will shutdown with a flashing LED indicating an overload and can be reset by pressing the tactile button.

I haven't been able to melt anything yet, my graphite crucible overloads the circuit, but I have a few 20x20mm crucibles on their way.