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Collection: Directories and Documents > Pamphlets
Minerology Handbook by Eckert Mineral Research Prospector Supplies (PH 2-2) (28 pages)
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Page: of 28
and foliated structure. Brucite is of secondary origin accompanying
other magnesian minerals in serpentine, in metamorphic limestones,
and with chlorite minerals. Very important mineral in the building
supply line.
Calcite—Calcium carbonate, CaCo3, crystallized in hexagonal] form,
and thus distinguished from aragonite;—called also calc-spar and calcareous spar. It cleaves readily into rhombohedrons, H3. Sp. Gr. of
crystals, 2.71. Besides common limestone, chalk and marble, calcite includes, among other varieties, agaric mineral, aphrite, argentite, calcsinter or calc-tufa, doxtooth spar, Iceland spar, stalactites, stalagmites,
Calamine—Silicate of zinc, occurring in white translucent crystals, or
in masses of various textures and form. Hardness 4.5 to 5. Specific
gravity—3.4 to 3.5.
CARNOTITE—Vanadium, Uranium, and Potassium—The mineral ts
an impregnation of sandstone. It is radioactive and a source of radium.
Madame Curie got her radium first from western Colorado and eastern
Utah, where it is found in large sedimentary depositions, coloring sandstone a never forgetable yellow. The theory advanced is deposition by
comet and impregnation of sandstone by volatilization of water through
the sandstones.
Uses—Vanadium as an alloy gives resilience to steel. Laboratory research is diligently seeking for other uses.
Uses—Uranium. Development of atomic power; atomic bomb; motive force in engines.
The heaviest element known, wt. 238. The form 235 now separated
is unbelievably powerful.
Cassiterite—Native tin dioxide, SnO2; tinstone; a mineral, usually
brown or black in color, occurring in crystals of brilliant luster, and
also in massive forms, sometimes compact with concentric fibrous structure resembling wood (wood tin), sometimes in rolled fragments or pebbles (steam tin). It is the chief source of metallic tin. Hardness 6 to
7. Specific gravity—6.8 to 7.1.
Cerussite—Lead, Carbon, and Oxygen—This ore has a similar genesis
as malachite. It is formed by the action of carbonated waters in tne
upper levels of ore bodies. It is easily prepared in the laboratory.
Chalcedony—A cryptocrystalline, translucent variety of quartz, commonly of a pale blue or gray color, uniform tint, and luster nearly like
wax. Specific gravity 2.5 to 2.64. Chalcedony of special or variated
color is known as carnelian, chrysoprase, hellotrope, agate, onyx, etc.
Chalcopyrite (or copper pyrites)—A bright brass-yellow sulphide of
copper and iron, CuFeS2. It is one of the most important ores of copper. H—3.5-4. Sp. Gr.—4.1-4.3. The color is so golden, that it is frequently mistaken for gold—hence, it is often called “fool’s gold.”
Chlorite Schist (meaning of Chlorite)—Any of a group of monoclinic minerals of extensive occurrence, associated with, and closely resembling, the micas, and ordinarily characterized by a green color. They
are essentially hydrous silicates of aluminum ferrous iron, and magnesjum, and include clinochlore, penninite, prochlorite, corundophilite, and
other species less distinctly crystalline.
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