Engineered stone has spent two decades winning kitchens worldwide, but the silica dust generated when fabricating high-silica slabs has prompted a regulatory response that importers cannot ignore. Australia banned the supply of engineered stone with more than 1% crystalline silica from July 2024, and health authorities in other countries are reviewing similar measures. Buyers specifying quartz for Australian, European, or North American projects now need to understand silica content — and the low-silica alternatives entering the market.

Why Silica Became a Regulatory Issue

Crystalline silica is the main component of standard engineered quartz — typically above 90% by weight. Cutting, grinding, and polishing these slabs releases respirable crystalline silica dust. Prolonged exposure causes silicosis, an irreversible lung disease that clusters among fabrication workers.

• Australia: Prohibited the manufacture, supply, and installation of engineered stone with more than 1% crystalline silica from 1 July 2024, following a national workplace safety review
• United States: OSHA's existing silica dust standards already govern fabrication shops, and several states have reported silicosis clusters among stone workers
• Europe: Workplace dust directives apply, with growing scrutiny of high-silica fabrication

The direction of travel is clear: crystalline silica content in manufactured surfaces is under pressure everywhere.

What Is Low-Silica Engineered Stone?

Manufacturers have responded by reformulating slabs to keep the quartz look while cutting crystalline silica far below regulatory thresholds:

• Reduced quartz loading: Slabs built primarily from low-silica minerals and recycled glass with quartz accents
• Silica-free mineral surfaces: Engineered slabs using feldspar-based and other silica-free mineral mixes
• Performance parity: Modern low-silica products retain non-porous surfaces, food-safe certifications, and the color consistency that made quartz popular

For buyers, the practical requirement is documentation: ask for the crystalline silica percentage by weight and the test method used, not just a "low silica" label.

What Buyers Should Ask Suppliers

1. Silica content declaration: Crystalline silica percentage by weight, with an independent test report 2. Regulatory fit: Written confirmation the product is compliant for your destination market — essential for Australia-bound projects 3. Certifications: NSF/ANSI 51 for food contact, GREENGUARD Gold for indoor air quality 4. Fabricator guidance: Recommended cutting and polishing practices for the reformulated product

Natural Stone: The Zero-Silica-Question Alternative

Natural granite, marble, quartzite, and travertine contain silica in varying amounts, but as solid quarried stone with no resin binder, they fall outside engineered-stone prohibitions. Fabricators still must control dust, but many markets treat natural stone under conventional workplace rules rather than the new bans.

• Granite and quartzite: High durability with established fabrication ecosystems
• Marble and limestone: Softer option for vanities, cladding, and low-abuse surfaces
• Serpentine and dolomite: Marble-look alternatives gaining shelf space as quartz-substitute choices

A mixed-material specification — quartz where hygiene and color consistency matter, natural stone where heat, outdoor exposure, or regulation calls for it — is now standard practice for sophisticated buyers.

Frequently Asked Questions

Is all quartz banned in Australia? Only engineered stone above 1% crystalline silica is prohibited. Compliant low-silica engineered products and natural stone remain legal to supply and install.

Does low-silica quartz cost more? Reformulated slabs generally carry a modest premium, though prices continue to settle as production scales.

How do I verify silica content? Request an independent laboratory report stating crystalline silica percentage by weight and the analytical method, plus supplier written compliance confirmation.

Is natural stone completely free of silica risk? No — many granites are silica-rich, and fabricators must still manage dust under workplace regulations. The bans specifically target manufactured (engineered) stone slabs.

Compliant Supply, Confident Projects

YDL Stone supplies both certified quartz lines with full documentation and natural stone blocks/slabs for every market segment. Contact our export team for silica declarations, compliance documents, and material recommendations matched to your destination market.