TABLE 2 
 
NEVADA: CONSTRUCTION SAND AND GRAVEL SOLD OR USED BY 
PRODUCERS IN 1992, BY MAJOR USE CATEGORY 
 
 Quantity  Value ValueUse (thousand short tons) (thousands) per ton 
Concrete aggregates (including concrete sand) 2,955 $14,545 $4.92Plaster
and gunite sands 260 1,452 5.58Concrete products (blocks, brick, pipe, decorative,etc.)
80 646 8.08Asphaltic concrete aggregates and other bituminousmixtures 2,597
12,995 5.00Roadbaseandcoverings' 4,931 15,408 3.12Fill 1,673 4,043 2.42Snow
and ice control 28 103 3.68Other miscellaneous uses~ 178 735 4.13Unspecified:'
 Actual 8,787 35,795 4.07  Estimated 2,785 7,863 2.82     Total ~24,273 93,585
3.86             36 22,020 93,585 4.25 
' Includes road and other stabilization (cement). 
' Includes filtration. 
' Includes productionreported withouta breakdownby end use and estimates
for nonrespondents. 4Data do not Md to total shown because of independent
rounding. 
' One metric ton is equal to 1,000 kilograms or 2,204.62 pounds. To convert
short tons into metric tons, multiply short tons by 0.907185. 
6Total quantity and total value in thousand metric tons and thousand dollars.

NEVADA—1992  347plant had a capacity of 5 million to 6 million
pounds
per year of titanium and employed 34 people. 
 
Industrial Minerals 
 
 Barite.—Nevada was the leading producer of barite among the States
with more than 75% of the total, followed by Georgia and Missouri. It was
used principally in drilling fluids with minor use in chemicals and as fillers
in paper, plastics, and glass. Nevada's barite production in 1992 was reported
to be 344,000 metric tons, which was a significant decrease from that of
1991. However, a larger share of barite shipped in 1992 was higher value
ground barite, so the total value of barite produced in Nevada was up slightly
from that of 1991 at about $12,427,000. 
 Three firms reported 1992 production in Nevada, with M.I. Drilling Fluids
Co. again ranked the number one producer from its Battle Mountain operations
in Lander County. Milpark Drilling Fluids 
Inc. ' s Argenta Mine in Lander County and Circle A Construction Inc. ' s
Dry Creek operation in Elko County were additional producers. 
 Baroid Drilling Fluids mined barite from the Rossi Mine near Dunphy but
did not report production to the USBM. 
 
 Cement.—Portland cement from the Centex Corp. ' s Nevada cement
plant
near Femley was Nevada's only reported cement production in 1992. 
 
 Clays.—Nevada's total clay production decreased 28.5% from that
of
1991, according to the NBMG, and consisted of bentonite, fuller's earth,
and kaolin varieties. Kaolin was the most valuable of the three types ofclay
produced, followed 
by fuller's earth and bentonite. Total bentonite production of 15,780 metric
tons was valued at more than $3.4 million. Leading bentonite producers included
Floridin Co. ' s IMV Division and Vanderbilt Minerals Corp. Floridin also

produced fuller's earth. Centex Corp. 
was the principal kaolin producer. 
 
Diatomite.—Diatomite production in 
Nevada increased 0.2% fromthat of 1991 
and value 4.6 % . Nevada was second 
among the States following California in the 1992 production of diatomite.
On the basis of total value, diatomite is the 
second most important industrial mineral mined in the State. According to
the 
NBMG, total annual production nears 
200,000 tons. Diatomite filter aids are 
shipped worldwide. Eagle-Picher Industries, Inc. produced the bulk of 
Nevada's diatomite. Filtration-grade diatomite was produced at the company's

Colada operation in Pershing County. The company produced absorbent and 
filler-grade diatomite at its Clark operation in Storey County and shipped
crude diatomite from a pit near Femley in Lyon County. 
 Two other companies produced 
absorbent and filler-grade diatomite in the 
. Fernley area in 1992: Moltan Co. , which markets cat litter regionally,
and CR Minerals, which sells diatomite for insulation and absorbent manufacture.
Grefco. Inc. mined filler and absorbentgrade diatomite at Basalt in Mineral
County. 
 
 Gypsum.—Despite a 4.5% increase in Nevada's 1992 gypsum production
from that of 1991, the value of 1992's gypsum was 24% lower than that of
the previous year, as continued weakness in the construction industry in
California and Nevada resulted in lower prices. U.S. Gypsum Corp.'s Pershing
County mine was the State's largest producer at about 400,000 short tons.
James Hardie Gypsum at Blue Diamond near Las Vegas was the second largest
producer in the State at about 380,000 short tons, followed by PABCO Gypsum
and Georgia Pacific Corp., both in Clark County. 
 Homestead Minerals, a subsidiary of the Art Wilson Co., mined gypsum and
anhydrite near Carson City that was sold to cement manufacturers and agricultural
users.