Silicosis Lawsuit Alleges 3M Respirator Mask Failed to Protect Stone Worker

Lawsuits allege stone manufacturers and respiratory safety equipment makers failed to adequately protect workers from serious lung disease caused by silica dust exposure.

A California stone worker has filed a silicosis lawsuit alleging the 3M respirator masks he relied on for protection failed to prevent him from inhaling dangerous silica dust released while cutting and fabricating artificial stone countertops.

The complaint (PDF) was brought by Pablo Romero Bonilla in the Superior Court of California for San Francisco County last month, naming 3M Company and a number of artificial stone manufacturers, suppliers and equipment makers as defendants. 

Bonilla identifies 3M as the manufacturer or supplier of masks and respirators he used while cutting, drilling, grinding, polishing and fabricating stone products. He claims the widely used safety equipment failed to provide the level of protection workers may have expected when exposed to the extremely high concentrations of silica dust generated during artificial stone fabrication. 

Stoneworker Silicosis Risks

Stone countertop workers face substantial silica dust exposure when cutting, grinding, polishing or installing quartz and other engineered stone products, which can release high concentrations of fine crystalline silica particles into the air. Repeated exposure places fabricators, installers and other stoneworkers at risk of severe and potentially life-threatening lung injuries, including silicosis.

Silicosis is an irreversible and progressive lung disease caused by inhaling crystalline silica dust, which triggers inflammation and permanent scarring in the lungs. As the disease advances, breathing can become increasingly difficult, and severe cases may lead to respiratory failure or require a lung transplant.

In recent years, a growing number of silicosis lawsuits have been filed against engineered stone manufacturers and other companies, alleging they failed to adequately warn workers about the serious health risks associated with silica dust exposure.

While many silicosis lawsuits focus primarily on the manufacturers and suppliers of engineered stone products, Bonilla’s complaint also raises questions about respiratory safety equipment workers may have relied on to protect themselves from silica dust. The lawsuit maintains that wearing 3M respiratory protection did not prevent Bonilla from inhaling dangerous particles during years of stone fabrication work.

3M Respirator Mask Allegations

According to the complaint, Bonilla worked as a stone fabricator at Green Valley Slab Works in Santa Rosa, California, from approximately 2008 until 2017. He later began working for North Bay Monument Co. in Rohnert Park, California, where the lawsuit indicates he remained employed when the complaint was filed.

Throughout those years, Bonilla says he routinely cut, ground, drilled, edged, polished, fabricated and installed artificial stone products, exposing him to airborne silica, metal dust and other potentially toxic substances.

Bonilla was diagnosed with silicosis on May 9, 2026. The complaint indicates he did not know before that diagnosis that his lung disease was linked to his occupational exposure or that the artificial stone products he worked with could expose him to dangerous levels of silica dust.

However, Bonilla claims he routinely wore particulate masks and other respiratory equipment, including products manufactured by 3M, believing they would help protect him from the dust generated during stone fabrication.

Bonilla alleges 3M’s particulate masks were “grossly inadequate” for artificial stone fabrication and failed to prevent workers from inhaling dangerous amounts of fine silica dust.

According to the filing, 3M knew or should have known its respiratory equipment would not provide sufficient protection under the conditions encountered by artificial stone workers, but failed to adequately warn users about those limitations or provide sufficient instructions concerning proper fit and use.

Bonilla also alleges the respirators were defectively designed because they allowed hazardous silica particles to pass through and be inhaled during reasonably foreseeable use. He claims his reliance on that equipment contributed to his continued silica exposure and eventual development of silicosis.

“As a direct and proximate result of his exposure to silica, metals and other toxins, Plaintiff, Pablo Romero Bonilla, has had or is likely to receive additional substantial medical treatment, including hospitalizations and surgeries, including a lung biopsy and future lung transplantation.”

— Pablo Romero Bonilla v. 3M Company et al.

The complaint raises allegations of negligence, failure to warn and design defect against 3M and the other defendants. It seeks damages for Bonilla’s alleged injuries, medical expenses, lost income and reduced earning capacity, as well as mental anguish, emotional distress, fear of death and diminished quality of life. 

Silicosis Lawsuits

Bonilla’s complaint comes amid a number of silica dust lawsuits being filed nationwide by countertop fabricators, installers and other stoneworkers who developed silicosis and serious respiratory illnesses after occupational exposure to dust generated by engineered stone products.

Workers who experienced regular silica dust exposure may be eligible to pursue compensation if they were subsequently diagnosed with conditions such as:

• Silicosis
• Chronic obstructive pulmonary disease (COPD)
• Kidney disease
• Lung cancer
• Lung infections, including tuberculosis

Silicosis lawyers are evaluating potential claims for quartz countertop workers throughout the United States who developed silicosis following workplace exposure to silica dust. Free consultations are available to help determine whether affected workers may qualify to pursue financial compensation.

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