There are currently a total of (1) companies in this list.
SMI
Specialty Minerals' production facility in Adams, Massachusetts, has been manufacturing fine industrial mineral products since 1961, and nano precipitated calcium carbonates for more than 25 years. But Adams has been in operation much longer, since 1848, producing limestone for local iron foundries, whitewash manufacturers and agricultural uses. The town of Adams is located in the northwest corner of Massachusetts in the Berkshire Mountains. Before Minerals Technologies Inc. became a publicly traded company in 1992, this plant was part of the minerals operations of Pfizer Inc. It is now part of the Performance Minerals group of Specialty Minerals Inc.
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Note: Some of the companies listed in this Massachusetts Stone Products Directory may also own/manufacture/raise/produce them in other states and countries as well. Many businesses alter their brand names, practices and designs with little or no notice, so if there are still questions that remain, we suggest contacting the manufacturer directly.