Off Route 4 at the Village Green
Grafton, NH 03240
Late May-early June, open weekends,
Early June-mid-Oct, open daily
The oldest and most spectacular mica, feldspar, beryl, and uranium mine in the USA. Mineral collecting permitted! Fun for all ages, an easy walk from your car.
Drive right to the top of Isinglass Mountain over an excellent access road and park on the summit plateau. Here you are greeted by a vast panorama of valleys, forest and surrounding mountains including Cardigan, Kearsage and Ragged - You can see for miles!
A short walk from your car and you are in a man-made canyon with walls of white quartz and feldspar which gleam like alabaster in the sun. While mostly an open pit mine, there are also giant rooms and tunnels with arched ceilings to explore at your leisure.
Famous for its rich mica deposits, Ruggles Mine also offers 150 other minerals, including amethyst, garnet, rose and smokey quartz, and beryl. Its uranium minerals such as gummite and autunite are prized by collectors and museums the world over.