Michigan Float Copper (Cu9.75)


  • This semi-polished specimen of float copper was carried by glaciers during the last ice age, which ended some 12,000 years ago.

  • It was then deposited in its end moraine & subsequently unearthed by metal detecting (on private land with mineral rights).

  • Polished portions of the face to a mirror-like shine

  • Applied high-grade lacquer to polished portions to prevent oxidation

  • Covered with cuprite, a red copper oxide, malachite, a green copper carbonite, and silver a secondary mineral

  • Sourced: Keweenaw Peninsula, Michigan USA

  • Minerals: Copper, Float

  • 4" x 3'5" x 9"