By D. A. (Midwested) on Wednesday, December 27, 2023 - 10:10 pm:
Hello JT,
I believe you are speaking about what has become known as "The Ontonagon Boulder". It probably does still reside in the Federal Museum system somewhere, under the supervision of the Smithsonian. At approximately 4.5 tons it is small in comparison to "The Great Sand Bay Boulder", which weighs about 17 tons. It was on display for awhile at the Quincy Mine Hoist until a place was created at the A.E. Seaman Museum. It is the current world record holder for the largest piece of native float copper.