A growing body of scientific literature has characterised the dust emissions generated when engineered stone is cut, ground, and polished — and the findings are sobering. Engineered stone produces significantly higher concentrations of respirable crystalline silica (RCS) dust than natural stone, with a higher proportion of particles in the most dangerous sub-5-micron range. Understanding the science helps explain why regulators have singled out engineered stone for special treatment.

What the Research Shows

• Dust concentration: Dry-cutting engineered stone can generate RCS concentrations 50-100x the OSHA PEL within minutes
• Particle size distribution: A higher proportion of engineered stone dust falls in the alveolar fraction (<4μm) that reaches deep lung tissue
• Polymer content: The resin binder in engineered stone may contribute to combined dust toxicity beyond silica alone — an active area of research
• Wet-cutting effectiveness: Properly maintained wet-cutting reduces RCS by 85-95%, but does not eliminate exposure — residual dust settles and dries

Implications for Industry

The science is clear: engineered stone represents a distinct occupational health risk profile that generic silica standards may not adequately address. This is the evidence base driving Australia’s product ban and similar regulatory proposals globally. For fabrication businesses, the operational question is straightforward: either invest in the controls required to manage this risk, or switch to materials that eliminate it at source.