A watch chain must have a fob, so today I made one from 18 ga. steel wire and a marble from my collection. It is a glorious marble, with bubbles, streaks, and sort of a champagne color. And also from steel wire, a hook. Both were darkened and polished with gun blue, which can produce some peacock colors, although in mild steel it isn't as obvious. Then I finished off with Renaissance Wax.
The links and jump rings come next.
It's a delight to work with the sort of focus that allows each stage to be an end in itself, as mindfully as I can manage, no hurry. That lets the ideas flow.