***It also gave instructions for turning base metals into gold.***
When there is as much gold as lead in the world, then gold will have the same value as lead. it’s rarity is what gives it value. Ok, it is also glittery to the eyes.
AND IT DOESN’T CORRODE! So when you dig it up in an archeological site, it’s still gorgeous!
Usefulness gives the gold much more value. Gold is malleable ductile, resistant to most acids, pretty, non-toxic, and a great conductor. Lead, no matter how rare, fails at all that.