· Pizza Stones & Baking Surfaces
Cousin Diana's Pizza Stone, Is It Non-Toxic?
Lower-concern choice; uncoated pizza stone avoids Teflon-family coating coatings.
Pizza stones are typically cordierite or similar porous ceramic without nonstick or water-resistant coatings, making PFAS exposure lower concern. Doesn't claim PFAS-free status, but the uncoated stone format avoids Teflon-family coating.
The better-graded swap
15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts
90/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Cordierite stone (uncoated)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is Cousin Diana's Pizza Stone non-toxic? What it is made of
Cordierite is a naturally occurring magnesium-aluminum silicate mineral, chemically stable at high temperatures and non-reactive with food. Pizza stones in this material are fired ceramic products that do not require synthetic coatings to function. Uncoated cordierite means no Teflon-type coating (Teflon) or other Teflon-family coating layer that could degrade and release fumes if overheated. The material's porosity allows moisture absorption during preheating, which helps create crispy pizza crusts.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Thermal shock and fracturing
Cordierite is durable but brittle; rapid temperature changes or cold water contact can cause stress fractures. Broken pieces are not a chemical hazard but create functional failure and potential for sharp edges during removal.
Microcracking and moisture trapping over time
Repeated heating and thermal cycling can create microscopic cracks in cordierite that trap water. While not immediately unsafe, this degrades performance and may eventually promote structural failure; replacement every 3-5 years of heavy use is typical.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Lead
No recalls or test results documenting lead or cadmium contamination in the brand's cordierite pizza stone are on public record. Uncoated cordierite itself does not concentrate heavy metals, but natural stone sources can occasionally contain trace impurities; The brand does not publish independent assay data.
Source, ATSDR ↗Ceramic glaze contaminants (if any finishing layer present)
Product is described as uncoated, so no glaze hazard applies. If any surface treatment is present, it is not documented in available product literature, making independent verification impossible.
How is this PFAS grade calculated?
The brand's record and disclosure
The brand is a Groupe SEB subsidiary known for pressure cookers and cookware but has minimal public transparency on material sourcing or third-party testing for pizza stones specifically. No major recalls or safety controversies involving their pizza stone products are documented in public records. The brand does not prominently disclose lead/cadmium testing or finish certifications for this product category, which is standard industry practice but limits independent verification.
How it compares in its category
Uncoated cordierite pizza stones have lower concern than Teflon-type coating-lined or glazed alternatives because they eliminate coating-failure risks present in those products. Most competing uncoated stone products (Le Creuset, Emile Henry, generic cordierite) share the same material chemistry and comparable safety profiles. The trade-off is that uncoated stones require seasoning over time and cannot tolerate sudden temperature changes, but this is a durability issue, not a safety hazard.
If you buy it
Preheat the stone slowly in the oven to avoid thermal shock cracking; avoid running cold water over a hot stone. Do not use soap or abrasive scrubbers; wipe with a damp cloth and allow air-drying. Replace the stone if visible cracks develop, as these can trap moisture and promote failure during heating. Store in a dry location, as prolonged moisture absorption in cracks can weaken the structure over time.
What is not known about PFAS in this product?
- Basis
- Model estimate, 85% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Cousin Diana's Pizza Stone?
15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts
- Ceramic (clay-based baking stone)
- The brand calls it PFAS-free, which we have not verified
- Glaze degradation and surface leaching
3 hazards checked on this product, all on its full breakdown.
Deluxe Square Pizza Stone with Rack
- ceramic or unglazed stone; no nonstick coating
- The brand calls it PFAS-free, which we have not verified
- Ceramic or stone cracking and fragmentation
2 hazards checked on this product, all on its full breakdown.
- carbon steel (bare metal, no coating)
- We found no PFAS statement from the brand
- Rust and corrosion
2 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonMore pizza stones & baking surfaces grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.