Earlier quoted context omitted.
Yes and no. I respect the "they would have been recycled" argument, but, there would still be some . If you were good enough to cast a Dodecahedron, you are probably rich enough to keep your best one, to show off to all the new hipster kids.
Any metal we find after 2000 years is a miracle. So the amount of these dodecahedrons indicate that there were a lot more in circulation at the time. 2000 years of poor and homeless people looking for any metal they can sell as scrap. That's why I don't buy the apprentice argument that always pops up in these discussions. In this case you'd be excused for saying it's some sort of ritualistic object. Because rituals a…
That's not really true. There's regular finds of hoards of thousands of ancient coins that are in excellent condition, esp. Roman coins. You'll find there's an actually quite a large number of ancient metal artifacts archaeologists have discovered if you look into it. Certainly the preservation rate is very low since people tend to guard metal objects and recycle them, but things happen, today archaeologists estimate there's something in the order of 10-30 millions of Roman coins that have been recovered in museum collections and held by private owners.
This depends on the metal, of course, iron preserves poorly as does bronze, so those are rare, but gold preserves extremely well, and silver better than bronze, esp. in drier conditions.