Just because it's by a different name doesn't it mean it didn't exist. Either way not a lot changes for the Indians except instead of being slaved to death mining gold and silver, they'll be growing cash crops for very, very little to no recompensation.
Still, perhaps there's less pressure to expand out of the Caribbean basin? There's no gold and silver just lying around, so instead of sending expeditions hither and yon looking for it, they only send missionaries. And look where that went in Texas or California; there weren't any haciendas or anything of that sort, just isolated mission outposts. Even with God, it might be harder to convince people to sign up for expeditions that quite likely will get them killed withou the promise of Gold.
Another thing I don't think anyone in here has thought about--what about trade with the East? IIRC, Mexican and Peruvian silver bought a *lot* of Chinese, Japanese, Indonesian, and Indian goods...now there isn't any of that. Similarly, there was a developing silver crisis in Europe, which again isn't going to find relief. Devaluation will be the order of the day, I suppose, which can't possibly be good for the general European economy .