American Metalcraft · Pizza Stones & Baking Surfaces
Pizza Baking Stone, 15", Ceramic, American Metalcraft STONE15, Is It Non-Toxic?
Ceramic baking stone carries lower PFAS concern without known coatings.
Plain ceramic isn't treated with Teflon-family coating or nonstick coatings that contain PFAS. No special water-resistant or stain-resistant treatments are reported for this stone.
The better-graded swap
Deluxe Square Pizza Stone with Rack
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
Ceramic
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is Pizza Baking Stone, 15", Ceramic STONE15 non-toxic? What it is made of
This is a solid ceramic pizza stone with no applied coatings, glazes, or nonstick surfaces mentioned in available product information. Unglazed or minimally finished ceramic baking stones carry lower contamination risk than enameled cookware because there is no surface layer prone to chipping or leaching. The 15-inch size is typical commercial-grade thickness, which means slower heat absorption but greater thermal stability and lower crack risk compared to thinner consumer stones.
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 cracking
Ceramic stones are prone to stress fractures if exposed to rapid temperature changes. This is a handling and use issue rather than a material toxicity issue, but cracks expose the porous ceramic interior to bacteria and water infiltration. Gradual preheating and cooling prevent this.
Bacterial growth from water retention
Porous unglazed ceramic absorbs moisture and can harbor bacteria if stored wet or not dried thoroughly. This is a hygiene risk, not a chemical one, and is managed by proper drying and storage in a dry location.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Lead
No lead or cadmium contamination has been reported for American Metalcraft or Matfer Bourgeat ceramic baking stones. Modern ceramic cookware produced in the EU and US is subject to regulatory limits on heavy metals. Without visible glaze or coating on this product, the risk is lower than on enameled or glazed alternatives, but independent testing of this specific batch is not publicly available.
Source, ATSDR ↗Microcrack leaching and mineral migration
Unglazed ceramic can gradually release trace minerals (silica, feldspar) into food in theory, but no documented contamination has been reported from commercial ceramic baking stones. The risk is negligible for food contact at typical baking temperatures and short contact times.
Coating degradation or off-gassing
If this stone has any factory finish, no hazardous off-gassing is documented. Ceramic without synthetic coatings or Teflon-type coating does not emit fumes when heated. If the user applies sealers or oils, those introduce independent risk not inherent to the stone.
How is this PFAS grade calculated?
The brand's record and disclosure
Matfer Bourgeat is a French professional cookware manufacturer with a long history in commercial kitchen supply. The brand does not publicly disclose heavy metal testing or certification for consumer baking stones specifically, which is typical for this product category but limits transparency. No major recalls or contamination incidents involving their ceramic baking stones are on record in public databases. The brand does not market PFAS-free claims, consistent with their silent stance on the issue.
How it compares in its category
Unglazed ceramic stones like this one have lower concern than glazed ceramic alternatives because glaze formulations historically contained lead and cadmium in some regions, though modern EU/US production has largely phased this out. Compared to cordierite or stone composites, ceramic requires the same care but offers slightly lower thermal shock risk. This product sits in the middle range of the category, lower concern than cheap imported glazed stones, comparable to other mid-range European brands, and less expensive than high-end specialized baking stones.
If you buy it
Preheat gradually to avoid thermal shock cracking, and never run a hot stone under cold water. Avoid commercial oven cleaners and harsh scrubbing that can degrade the ceramic surface. Replace the stone if visible cracks develop, as they can trap bacteria and cause uneven heating. Hand wash only; do not soak or place in a dishwasher. Most ceramic stones last 5 to 10 years with proper care.
What is not known about PFAS in this product?
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- American Metalcraft has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Pizza Baking Stone, 15", Ceramic, American Metalcraft STONE15?
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.