Sure, but that doesn't make it immune to the passage of time.

Take Mesoamerican gold for instance: only about a thousand years have passed since much of it was made by humans, but it's still considered a rare and valuable archaeological find. (Granted, it was produced in smaller quantities than today.)

Gold is melted by fires; gets scattered and buried by a million years of bioaccumulation; seas move, rivers appear or disappear, continents drift a little, climate changes, glaciers come and go and further destroy evidence.

Google is feeding me a lot of really dumb stuff at the moment when trying to come up with numbers, but I'd guesstimate that most traces of our civilization would be buried a hundred feet below the surface after a million years' time. That makes it pretty difficult to find small things.

Mesoamerican gold was looted and melted down wholesale (along with a lot more silver) by the Spanish. The artefacts were considered unchristian and so were deliberately destroyed, and this has meant that we have barely a fragment of the artistry of the Inca and Aztec.

There is some hope though! It's thought that the melting process was done in Spain so as to allow a reliable royal assay, if so then some of the ships that sank in the trade may have holds full of crushed and squashed precious artefacts.

That’s interesting, can you provide any citations?

Mesoamerican gold is quite common in the gilded church alters of Spain.

It's also extremely soft (for a metal). Fossils survive in part because they are reactive and become harder in certain specific conditions.

It's also very soft