Apologies for hijacking, but it's interesting how lead and gold have changed in possible uses in the past couple hundred years. Gold was scarce, and used for d

Apologies for hijacking, but it's interesting how lead and gold have changed in possible uses in the past couple hundred years. Gold was scarce, and used for decoration. Lead was common, but used for (unfortunately) things like pipes. Now, gold is still highly prized as a store of value, while lead has continued to be found harmful (petrol, etc.) However, gold's electrical properties (and resistance to tarnish) make it a very valuable practical material. No point here, just interesting to think about how our perception of those materials has changed over time. (Kinda like how when aluminum was prized as great utensil material, because aluminum smelting took too much energy for what they had available.)