All MMGM visitors are currently required to wear masks regardless of vaccination status.

Visit the largest piece of Mars on Earth

Purchase tickets here

Tourmaline Turns 200 commemorates the bicentennial of the discovery of the Maine state mineral, tourmaline, in the fall of 1820.

Tourmaline (elbaite) is now known from more than 60 locations in Maine and gems have been faceted from at least a dozen of them. The exhibition combines specimens showing the range of colors, forms, species, and occurrences of Maine tourmaline with items from MMGM’s archival and library collections.

On view in the Discovery Gallery now. Happy Birthday Tourmaline!

The Big Find: A Legend Continues — Latest Updates

Call for Artists

In October of 1972, one of the largest and most significant gem tourmaline finds in North American history occurred in the mountains of western Maine. This discovery created – and still creates – ripples in the American gemstone industry.

The MMGM invites artists to tell the story of these gemstones – and their own story – through their artwork.

View Details > 

What’s Happening

View All Events >

Shop the Store

Specializing in jewelry made with colorful Maine mined gemstones from everyday casual to custom one-of-a-kind pieces. With a unique mineralogical niche, the Museum Store offers a wide selection of products for all ages.

Visit Our Online Store >

Annual Fund

Your gift supports everything you love about the MMGM, and helps to ensure the Museum’s stability and resiliency.

Donate Now >