Sluice Saturdays in the Summer Unleash your inner prospector! Dive into the adventure of sifting through mine tailings to uncover precious gemstones and minerals. Join Read More
Make Your Own Bismuth Crystal! Ever wanted to grow your own crystal? Now’s your chance! Join MMGM Education Outreach Coordinator Deb Johnson for a hands-on Read More
Free Admission Day For Mainers Enjoy free admission on us! MMGM is celebrating its fifth anniversary in a big way: Admission is free for all Read More