Exhibit 99.1

For more information: Jennifer Melsheimer
                      Investor Relations Manager
                      847/394-8730

FOR IMMEDIATE RELEASE

                      AMCOL INTERNATIONAL CORP. (NYSE:ACO)
                RECORDS $8.9 MILLION FOR INCOME FROM DISCONTINUED
            OPERATIONS; PREVIOUSLY REPORTED 2003 YEAR-END UNAUDITED
                             RESULTS TO BE REVISED

ARLINGTON HEIGHTS, ILL., Feb. 25, 2004-- AMCOL International Corp. (NYSE:ACO)
today announced that it will revise its previously reported unaudited results
for the fourth quarter and year-ended December 31, 2003 to include $8.9 million
of income from discontinued operations, or $0.29 per diluted share for the
fourth quarter and $0.30 per diluted share for the full year. The revision to
earnings is associated with a reduction of the Company's estimated income taxes
payable related to its discontinued U.K. metalcasting business, which was sold
in 2001. This reduction was determined upon the completion of the audits of the
Company's federal income tax return for years through 2001 by the Internal
Revenue Service (IRS). Those audits resulted in an actual tax liability that was
lower than the estimate of taxes payable related to those periods.

The IRS notified the Company, via a letter sent February 18, 2004, that the
Congressional Joint Committee on Taxation had completed a review of their report
in connection with its examination of the Company's federal income tax returns
for the years through 2001. The Committee agreed with the conclusions in the
report and, as a result, the Company adjusted its estimate of taxes payable to
reflect the actual amount due as of Dec. 31, 2003, based upon the IRS report.

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AMCOL INTERNATIONAL CORP.
INCOME FROM DISCONTINUED OPERATIONS
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The Company will revise 2003 fourth quarter and year-end unaudited results
originally reported on Jan. 20, 2004. The Company will report fourth quarter
2003 net income of $13.6 million or $0.45 per diluted share, compared with the
$4.6 million or $0.15 per diluted share previously reported. Full-year results
for 2003 will be revised to net income of $28.9 million or $0.97 per diluted
share, compared with the $19.9 million or $0.67 per diluted share previously
reported. Income from continuing operations will remain $4.6 million or $0.15
per diluted share for fourth quarter and $19.9 million or $0.67 per diluted
share for the full-year 2003.

AMCOL's year-end Form 10-K will be filed in March 2004 with the revisions
included.

AMCOL International Corp. is a specialty minerals company that produces and
markets products for a wide range of industrial and consumer-related markets.
AMCOL's common stock is traded on the New York Stock Exchange under the symbol
ACO. The company's web site is www.amcol.com.

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