What most naturally follows?

How to assay gold
Prepare your equipment.
You will need a crucible to put the sample into. You will need a heat source such as a torch or furnace to bring the sample to high temperatures.
You will also need other reactants such as the additives to create the flux, the bone ash to cupel the metal, and some sodium nitrate to extract residual silver. You will also need molds to pour hot metal into.