have
been found in the hornblendic gneiss on the Schuylkill River, near
Philadelphia, and in yellow crystals with sunstone, in Kennett
Township, Chester County, Pa. Some small yellow crystals were found at
Fort George, N. Y., by William Niven, one of which was cut into a
transparent gem weighing 1/8 of a carat. Diana, Lewis County, N. Y.,
was a famous locality thirty years ago, but crystals from there are now
scarcely mentioned since the large dark-brown ones have been discovered
at various places in Canada.
Malachite,
although occurring in many localities in the United States, and
occasionally in considerable abundance, as one of the ores, or
associated with other ores or copper, is obtained in gem form only in
Arizona, chiefly at the Copper Queen Mine, at Bisbee. One mass weighing
15 pounds is now in the State Museum at Albany, N. Y., and others,
nearly as large, and equaling the Russian in quality, have been found,
which, by piecing, will furnish table-tops. One of the finest specimens
of the velvety form of crystals is a piece from the side of a large
cavity, over a foot across, in the American Museum of Natural History,
New York City. It is one side of a geode filled with stalactites coated
with the richest deep-green, velvet-like crystals of malachite. Many of
the stalactites at Bisbee are over a foot long, an inch across, and are
often curiously entwined. Veins, of this mineral from 1 to 4 inches
thick have also been found there. It is to be regretted that thousands
of tons of this beautiful mineral have been put into the furnace for
the copper it contains. One very fine, compact, fibrous mass of
dark-green malachite from the McCullock Mine, that would cut into a
cube an inch square, is in the cabinet of Clarence S. Bement. Hoffmann
mentions malachite in massive concretions in Copper Canon, Galena
district, and at Mineral Hill, Nev. At Ducktown, Tenn., some fine,
radiated masses have been found that'would polish well. At the Jones
Mine, Berks County, Pa., very dark-green and finely mottled malachite
was found that would cut into gems over 2 inches across. Some of the
finest of these specimens are in the cabinet of William W. Jefferis.
The material from this locality equals that from Arizona, but the
supply is very limited. Malachite is
