The world’s richest known lithium deposit lies deep in the woods of western Maine, in a yawning, sparkling mouth of white and brown rocks that looks like a landslide carved into the side of Plumbago Mountain. Mary Freeman and her husband Gary found the deposit five years ago while hunting for tourmaline, a striking, multi-colored gemstone found in the region.
The Freemans make their living selling lab supplies through the Florida-based company they founded 40 years ago, Awareness Technology. But their true love is digging for gemstones, which has brought them for years to Mary’s home state of Maine, the site of some of the best tourmaline hunting in the world.