Zardnaar
Legend
Gold is dense. That's about an 11-cm cube -- not very much. And it's a lot of money. Wikipedia cites a talent of silver as nine man-years of skilled labor. No word on the conversion to a talent of gold, but obviously it's gonna be even more than that.
It was valuable but wages were realy really crappy for the average worker. They had access to tons of gold though in the good old days so to speak. Alexander sacking the Persians, Rome in general, the Spanish main, Mansa Muta etc.
A talent of gold in D&D is 2850gp at 1 sp per day or 36 gold per year its around 70-75 years income for the average D&D labourer. Adventurers are more like minor nobility and later minor royalty in terms of income.