This shop deals in all kinds of metals: gold, silver, copper, iron, tin and so on.
Tips
culture
This is the traditional list behind the modern term 五金 (wǔjīn, 'hardware'). Hardware shops are still called 五金店 — a fossilized reference to these five metals.
memory
Listed roughly in order of decreasing perceived value: 金 (gold) > 银 (silver) > 铜 (copper) > 铁 (iron) > 锡 (tin).