By Capt. Paul (Eclogite) on Sunday, August 26, 2018 - 04:34 pm:
Thanks for using a couple of my photos, Mary; however, the Quincy Rock Swap is not put on by Michigan Tech, but rather the Copper Country Rock & Mineral Club and the Quincy Mine Hoist Association itself as part of the Keweenaw Week festivities that occur the second week of August.
Mary says: OOPS...I may have misread what I posted back in 2015: "...the Quincy Mine Mineral Swap, which was held during the week long mineral festivities put on by Michigan Tech." Thanks for catching that, Capt. Paul!