American Metalcraft · Pizza Stones & Baking Surfaces
PSB16 16 Inch Black Round Cordierite Pizza Stone, Is It Non-Toxic?
Pizza stone; cordierite is lower concern for PFAS.
Cordierite pizza stones are uncoated mineral products with minimal PFAS risk. No brand disclosure needed; material itself presents lower concern.
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 PSB16 16 Inch Black Round Pizza Stone non-toxic? What it is made of
This pizza stone is cordierite, a naturally occurring magnesium-aluminum silicate mineral fired into a rigid ceramic form. Cordierite is chosen for pizza stones because it absorbs and distributes heat evenly and resists thermal shock better than many clays. The PSB16 is uncoated solid cordierite, meaning there is no glaze, enamel, or polymer finish that could degrade, chip, or leach into food. The material itself is inert once fired and does not dissolve or transfer harmful compounds under normal cooking temperatures.
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 cracking
Cordierite is resistant to thermal shock compared to many ceramics, but placing a cold stone on high direct heat or pouring cold liquid on a hot stone can still cause cracking. This is a use hazard rather than a material hazard; proper handling eliminates the risk.
Porous material harboring bacterial growth
Cordierite is slightly porous and can retain moisture if not dried thoroughly after cleaning. Regular air-drying and avoiding prolonged water soaking minimizes any microbial growth risk. This is routine maintenance concern, not a material defect.
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 uncoated cordierite with no glaze, enamel, or ceramic coating applied. No surface treatment is present to leach these metals.
Source, ATSDR ↗Aluminum leaching
Cordierite is a fired magnesium-aluminum silicate, but the aluminum is chemically bound in the crystal structure and does not leach under normal cooking conditions or food pH. No reports of aluminum release from cordierite pizza stones exist in public records.
Coating degradation and particle shedding
The product has no applied coating; cordierite stone itself does not degrade, peel, or shed particles with normal use. Surface cracks or chips can occur from thermal shock or impact, but these are visible damage, not coating failure.
How is this PFAS grade calculated?
The brand's record and disclosure
American Metalcraft is a US-based foodservice and kitchenware manufacturer with a long operational history. No significant safety recalls or formal PFAS disclosures are on public record for this product line. The brand does not publish detailed material certifications or third-party testing results for this pizza stone model. Absence of disclosure is typical for commodity cordierite bakeware and does not necessarily indicate a hazard.
How it compares in its category
Pizza stones are among the lower-concern cookware options because they are passive heat vessels with no active coatings or chemical releases. Cordierite models are preferred over clay or earthenware alternatives because they are more durable and less prone to cracking. Compared to non-stick or ceramic-coated pans, uncoated stone avoids coating degradation and Teflon-type coating fume risks. The 16-inch round size is standard and carries no known material differences from smaller or larger cordierite stones.
If you buy it
Season the stone lightly with oil before first use to help it absorb moisture evenly and resist sticking. Do not submerge it or run it under water; wipe with a damp cloth and air-dry to prevent cracking from rapid moisture absorption. Avoid rapid temperature swings; preheat slowly in the oven rather than placing a cold stone directly on high heat. Replace the stone if it develops large cracks or chips that could shed fragments into food; normal surface wear and minor discoloration are expected.
What is not known about PFAS in this product?
- Basis
- Model estimate, 92% 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 Inch Black 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.