best place to sell gold

i have been wondering how did they know the price of gold is at certain amount and sometimes it goes up or down. then this price is being used throughout the whole world.. its amazing how this world commodities are being determined by a few people….who determine the price? how they did it?

I know scap gold shops sell to refiners, but can someone explain the whole process from some gold chain to shop refiner and so on.
Why can’t I per say (dnt wear gold, not my tatse) sell it to the refiners. What happens after the refiner.
I am bit vague but i hope you get what i’m [...]