544 MINERALS YEARBOOK, 1967  fabricated at four plants for consumptionby
the electrical and electronic industries. 
 
REVIEW BY MINERAL COMMODITIES 
 
NONMETALS 
 
 Cement.—Nearly 9.9 million barrels of portland cement and 61 2,0u0
barrels ol masonry cement were shipped into New Jersey. Compared with 1966,
portland cement shipments weze slightly high~r, but masonry cement shipments
declined 9 percent. Most of the portland and masonry cement came from plants
in eastern Pennsylvania and eastern New York. Limited quantities of portland
cement came from Maryland and Texas, and some masonry cement was shipped
from Virginia. Distribution terminals were operated at Bayonne, Elizabethport,
Jersey City, and Newark. 
 
 Clays.—Total clay production decreased by 51,000 tons from 1966. Most
of the decline was in production of miscellaneous clay and shale, which accounted
for 77 percent of the State's total tonnage. Fire clay output accounted for
the remaining tonnage, but contributed 64 percent of the total clay value.
Fire clay, used primarily in manufacturing refractory products, was mined
in Cumberland and Middlesex Counties. Other uses were for pottery and stoneware,
floor and wall tile, architectural terra cotta, for rotary drilling mud and
filler material for linoleum and insecticides. Miscellaneous clay and shale
was used entirely for manufacturing heavy clay products such as building
brick and vitrified sewer pipe. Production was chiefly from Middlesex and
Somerset Counties with quantities coming from Bergen, Burlington, and Camden
Counties. 
 
 Gem Stones.—Collectors obtained various mineral specimens from stone
quarries throughout the State, and particularly from old mine dumps at Franklin,
Sussex County. Minerals collected included fluorescent calcite, franklinite,
willemite, and zincite. Value was estimated at the same level as that of
1966. 
 
 Gypsuin.—Production and value of calcined gypsum were below the levels
of 1966 totaling 347,000 tons valued at $4.1 million. Crude gypsum from other
States and foreign sources was calcined at four plants, two in Burlington
and one each in Bergen 
and Camden Counties. The Edgewater, Bergen County plant of Fabricated Products
Division of Allied Chemical Corp. was purchased by Celotex Corporation in
August. Companies produced calcined gypsum for use in manufacturing plastering,
lath, sheathing, wallboard, and other building materials. 
 
 Iodine.—Consumption of organic and inorganic iodine by chemical and
pharmaceutical companies in the State totaled 396,000 pounds compared with
573,000 pounds in 1966. Mostly imported crude iodine was used for manufacturing
medicines, sanitation products, and other chemicals. 
 
 Lime.—.-Hydrated lime increased both in production and value over
1966. Output by one company in Sussex County was used in construction, agricultural
applications, sewage treatment, and water purification. 
 
 Magnesium Compounds.—Production and value of refractory magnesia dropped
below 1966 levels and a reduction in the average unit value was reported.
The refractory magnesia was produced in Cape May County from sea water and
from outof-State dolomite. J. T. Baker Chemical Co., Phillipsburg, Warren
County, refined various magnesium compounds from purchased material. 
 
 Marl, Greensand.—Production of greensand marl was greater in quantity
than in 1966, but value was unchanged because of lower unit prices. Output
was from one hydraulic mining operation in Gloucester County; the material
(natural zeolite) was used for water softening. 
 
 Mica.—Molecular Dielectrics, Inc., Clifton, and Synthetic Mica Co.,
Division of Mycalex Corporation of America, West Caidwell, produced synthetic
flake mica used in glass-bonded ceramic materials. Molecular Dielectrics,
Inc., continued production of high-quality synthetic mica crystals for splitting
and punching. Sheet mica (muscovite block and film) was