The "actual" gold price is so much below the current price that it doesn't matter.
I would say that a non-small part of it's jewelry usages is either because of it's perceived value or wouldn't drive the price nearly as much, sure people would still buy gold jewelry if it would not be perceived as that expensive, but they wouldn't be willing to pay nearly as much as they do today.
As far as I can tell at least 50% maybe up to 90% of the value is "believe" based.
But that doesn't mean it's a bubble or anything like that, believe drives value all the time and can be long term stable, as seen in the history of gold. (Through gold wasn't always in that position, silver was in golds position before the western world ran into a major trade deficit with china and mined much more of it, similar there had been cultures where gold was see as nice looking but otherwise worthless gifting it away to colonialists, which lead to misunderstandings about the amount of gold available.)