crystals
are found at St. Gothard, Switzerland, in Tyrol, Wales, and in Russia.
In the U. S. in Maine, New York and Arkansas. Named for the English
Mineralogist, H. J. Brook.
Brucite: Hydroxide
of Magnesium. Magnesia 69%, Water 31%. A soft white mineral occurring
in crystals and foliated masses, transparent to translucent. Brucite
resembles Gypsum. Talc, Diaspore and other micas. It is usually found
with other magnesium minerals in the Urals, Shetland Islands, France,
Italy and Sweden. In the United States, in New Jersey, New York and
Pennsylvania. It is named after an early American mineralogist, A.
Bruce.
Bunsenite: Nickel
protoxide. Oxygen 21.5%, Nickel 78.5%. Occurs in minute octahedrons,
sometimes having truncated edges, pistachio-green in color, with
brownish-black streak. Occurs in cavities with other nickel ores and
ores of Uranium at Joachimsthal, Saxony. Named after Prof. R. W.
Bun-sen, of Heidelberg.
Byssolite: A
variety of Amphibole which occurs in short silky fibers, olive-green in
color. Name derived from the Greek, Byssos, meaning fine flax,
so-called from its
fibrous nature. It is found in Bourg d'Oisans, Dauphine, France.
Cabrerite:
Hydrous Arsenate of Nickel and Magnesium. It is fibrous, concentric,
radiated, reniform and granular in occurrence. Apple-green in color,
and translucent to
transparent Found in the zinc mines of Laurium, Greece.
Calamine: Zinc
Silicate Contains Zinc Oxide 67.5%. One of the few silicates used as a
source of metals. It occurs in brilliant crystals, also granular and
compact, is glassy, transparent or translucent, and when pure is
colorless or white, usually, however, it is gray, yellow, brown,
greenish or bluish. This mineral is strongly pyroelectric, and becomes
phosphorescent upon rubbing. Calamine occurs in nearly all places where
zinc and lead ores are found, Prussia, Silesia, Spain, England, and in
the United States, at Sterling, N. J., in Virginia and in Mississippi.
Calamine is mined as a source of Zinc.
Calaverite: A
nearly pure Gold Telluride. Contains Tellurium 57.4%, Gold 39.5% and
Silver 3.1%, is opaque, silver-white or bronzy-yellow in color, and has
a
greenish-gray streak It is very brittle and without distinct cleavage.
Its surface is frequently covered with a yellow tarnish. This mineral
