U.S. Quartz Manufacturers Take Legal Action to Defend President Trump's Quartz Tariffs & Stop the Cheating

WASHINGTON, Sept. 29, 2026 /PRNewswire/ -- The Quartz Manufacturing Alliance of America (QMAA), a group of leading U.S.-based quartz slab manufacturers, today announced it has taken strong legal action to defend global safeguard tariffs on imported quartz surface products imposed by President Donald J. Trump on Aug. 15, 2026. The trade relief announced by President Trump followed a bipartisan investigation undertaken by the U.S. International Trade Commission (ITC), which found that an unprecedented surge of unfairly traded imports of quartz products had caused serious injury to the domestic industry.

On Aug. 21, 2026, a group of quartz importers filed a complaint with the U.S. Court of International Trade seeking to invalidate the serious-injury determination issued by a bipartisan set of ITC commissioners. This determination and the ITC's subsequent recommendation were the foundation for the tariff relief announced by President Trump. Through the legal action announced today, QMAA has exercised its right to intervene in the challenge to the global safeguard.

"The ITC's thorough investigation and President Trump's decisive action sent a beacon of hope to our rural Georgia community and our workforce," said Daniel Vaz De Melo Sa, Business Development Manager at Guidoni USA. "Today, as we invest in America and ramp up domestic quartz production, we are only taking these actions because of the President's global safeguard tariff."

"President Trump's righteous and bold action to impose a global safeguard tariff, based on a thorough investigation by the International Trade Commission, will Re-Shore domestic quartz manufacturing and bring many jobs back to the United States. This is what the TrumpTradeDoctrine is all about," said Cambria CEO Marty Davis. "The legal challenge is without merit, foreign importers and their proxies in the U.S. put forth false narratives that were resoundingly rejected by bipartisan, knowledgeable and well-informed ITC commissioners. We are confident that the U.S. Court of International Trade will rely on the same set of facts as the ITC and quickly grant our motion to intervene."

"The trade relief announced by President Trump provides the certainty we and our partners throughout the domestic supply chain need to sustain investment and American job growth," said Michael Morici, Vice President of Sales at LX Hausys. "We have full faith in the merits of the U.S. International Trade Commission's process and look forward to a prompt resolution of this frivolous appeal designed to delay the implementation of this important trade relief."

"The U.S. International Trade Commission is a respected authority in ensuring trade laws and policies are enforced appropriately," said Matt Kahny, President of Daltile. "The ITC's thorough safeguard investigation and subsequent trade relief provide important stability that gives American manufacturers the confidence we need to invest in our facilities and create more high-quality American jobs."

In September 2025, QMAA filed a Global Safeguard petition with the ITC under Section 201 of the U.S. Trade Act of 1974. In their testimony, members of QMAA adamantly expressed the need to restore free and fair trade for American manufacturers to compete on a level playing field.

During the ITC's thorough safeguard investigation, it found that a surge of imports had caused serious injury to the domestic industry. The tariffs, which took effect on Aug. 15, 2026, were issued in recognition of the serious threat posted to American manufacturers by countries who have violated U.S. trade laws and flooded the U.S. market with artificially cheap, government-subsidized imports.

The domestic quartz industry supports 100,000 American jobs. While domestic demand for quartz surfacing has grown by 62% within the past five years, domestic production has declined by 17.2% due to this import surge, with quartz slab imports increasing by 78.3% between 2020-2024.

Through its investigation, the ITC rejected claims pushed by foreign importers that imposing a tariff on imported quartz surface products "will contribute to 'housing affordability' concerns in the United States." Instead, the ITC found that the cost of imported quartz makes up only 0.07% of the average cost of a new home.

Free trade agreement countries, including Canada and Mexico, are exempt from the tariffs. However, the decision made by the President does not include exclusions for any specific products that have been previously used by quartz importers to undermine U.S. trade policy.

About the Quartz Manufacturing Alliance for America:
QMAA is a coalition of U.S.-based, American quartz slab manufacturing factories, united with other industry leaders to support and strengthen the American quartz industry. QMAA is committed to ensuring a free and fair, competitive marketplace born of free enterprise that provides the opportunity to compete on a level playing field for American quartz slab manufacturing factories and their valued workers. We also believe this effort will have a positive impact throughout the entire quartz surfacing industry, including to the strong benefit of American stone fabrication shops and upstream suppliers of quartz minerals and resin.

Learn more at: https://www.qmaa.org/

SOURCE Quartz Manufacturing Alliance of America