American Metalcraft · Pizza Stones & Baking Surfaces
PSB16 16" Round Cordierite Pizza Stone, Is It Non-Toxic?
Lower concern. Cordierite pizza stone has no known PFAS risk.
Cordierite is a naturally occurring mineral ceramic with no surface treatment or nonstick coating. No PFAS concerns documented for this material type.
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
cordierite ceramic
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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Is PSB16 16" Round Cordierite Pizza Stone non-toxic? What it is made of
Cordierite is a naturally occurring magnesium-aluminum silicate ceramic engineered for high thermal shock resistance, meaning it resists cracking when moved between hot and cold environments. American Metalcraft's PSB16 is an unglazed, uncoated round stone, so there is no applied enamel, glaze, or surface treatment that could degrade or leach. Cordierite itself is chemically stable at typical pizza-oven temperatures (up to 900F+) and does not release particles or fumes under normal cooking use.
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.
Ceramic crazing and surface degradation
Cordierite is engineered to resist crazing, but thermal shock from rapid heating or cooling can cause fine cracks over time. Cracks create food-trapping surfaces; the product should be replaced if cracking is visible.
Lead
If the stone develops hairline cracks from thermal stress, small ceramic particles could theoretically enter food; this is not unique to cordierite but is a risk with all ceramic stones if damaged.
Source, ATSDR ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Lead
PSB16 is unglazed cordierite with no applied surface coating; no glaze-based hazard pathway exists for this product.
Source, ATSDR ↗Thermal fume or off-gassing
Uncoated cordierite does not emit fumes or volatile compounds at pizza-oven temperatures; no Teflon-type coating or polymer coating present to degrade.
Aluminum leaching
Although cordierite contains aluminum as a component of its crystal structure, it is stable and insoluble under typical cooking pH and temperature; no evidence of leaching into acidic or fatty foods.
How is this PFAS grade calculated?
The brand's record and disclosure
American Metalcraft is a U.S.-based foodservice equipment manufacturer with a long history in commercial and retail kitchen products. The company provides minimal public safety disclosure on this product line; no third-party certifications (such as FDA food-contact statements) are listed on widely available product documentation. No recalls or safety controversies specific to cordierite pizza stones from this brand are on public record.
How it compares in its category
Unglazed cordierite stones carry lower hazard burden than ceramic stones with painted or glazed surfaces, which may contain lead or cadmium in decorative coatings. Cordierite is preferred over some low-cost ceramic alternatives because it resists crazing (fine surface cracks that can harbor bacteria) and does not require seasoning or oil maintenance like cast iron. Compared to ceramic pizza plates with enamel finishes, the PSB16's bare cordierite surface eliminates coating-leaching risk.
If you buy it
Preheat slowly (30-60 minutes) to avoid thermal shock and cracking. Never wash in a dishwasher or submerge immediately after use; allow cooling and hand-wash with warm water only. Inspect annually for surface cracks or chips; discard if cracks develop, as they can trap food and harbor pathogens. Store in a dry location; cordierite can absorb moisture if left damp for extended periods.
What is not known about PFAS in this product?
- Basis
- Model estimate, 78% 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 PSB16 16" Round Cordierite 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.