Many people picture mine tunnels in drab
shades of brown and gray. But at Morefield mine, vivid bands of blue
green amazonitea variety of feldsparglisten like a tropical
sea. The mine cuts into a pegmatite, a type of deposit characterized
by large crystals of feldspar and quartz with a great variety of
other minerals. Morefield is mined for amazonite, used as an ornamental
stone. Amazonite is found only in pegmatites.
Like many pegmatite deposits, the
Morefields is smallonly about 300 m (985 ft) long and
60 m (197 ft) deep. In the early 1900s, Silas V. Morefield first
worked this deposit from the surface for amazonite and mica. Today,
the Morefield is mined for amazonite.