Did they make copper clappers?..............
No, the copper clapper class got clipped
Note, that the copper the Pre-Columbians mined was nearly pure copper ore [ 95-99% ], as opposed to rich veins today which are only 0.53-0.40% copper ore. The estimated volume of ore mined would fill a fright train ore cars stretching 38 miles - all with near pure copper ore [ current estimate is 750,000 tons of Pre-Columbian mined ore ].
[ pure copper ] 750,000 tons ÷ 0.0053 [ modern recovery rate ] ≈ 141,509,434 tons of ore mined or 5.7 years.
Where did all that copper go?
Well [ cough ] coincidentally, the Pre-Columbian Native American copper mining in the Upper Peninsula of Michigan flourished between 4500–3400 BC which corresponds to the Copper Age (Chalcolithic period) in Europe, a transitional era between the Neolithic (New Stone Age) and the Bronze Age. We all believe in coincidences, right?
When AI asked “how much copper was used during the Copper Age 4500–3400 BC” it was stumped.