I'm pretty sure you have coconuts backwards, as they're native throughout the Pacific and Indian Oceans and had been known by the West since before the time of Romans. https://www.sciencedaily.com/releases/2011/06/110624142037.h...

Of course there are active theories that coconuts may have migrated or been transported by swallows to Western Europe.

Also gold was known to be in the New World according to Columbus on his initial voyage.

>The convenience of the harbors in this island, and the excellence of the rivers, in volume and salubrity, surpass human belief, unless on should see them. In it the trees, pasture-lands and fruits different much from those of Juana. Besides, this Hispana abounds in various kinds of species, gold and metals. https://www.gilderlehrman.org/history-by-era/exploration/res...