15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts vs OPEN BOX Emile Henry French Ceramic Pizza Stone: which is safer?

15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts is the clear pick. Williams Sonoma OPEN BOX Emile Henry French Ceramic Pizza Stone carries a failing PFAS grade, and we never recommend buying a failing product.

Our pick

15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts

15-Inch Ceramic Pizza Stone for Perfect Crispy Crusts

PFAS grade

Excellent 90/100

Overall grade

Good 64/100

Verdict

Buy with care

Hazard flags

⚑ 3

Material

Ceramic (clay-based baking stone)

Confidence

82%

PossibleGlaze degradation and surface leaching

LikelyThermal stress fracture

PossibleMicroporosity and microbial retention

Why this gradeBuy
Williams Sonoma OPEN BOX Emile Henry French Ceramic Pizza Stone

Williams Sonoma

OPEN BOX Emile Henry French Ceramic Pizza Stone

PFAS grade

Good 65/100

Overall grade

Good 57/100

Verdict

Skip

Hazard flags

⚑ 2

Material

Ceramic (Emile Henry stoneware)

Confidence

82%

PossibleGlaze degradation and crazing over time

PossibleMicrobial growth in porous material

Why this grade

Where these two actually differ

  • We flag Glaze degradation and surface leaching, Thermal stress fracture and Microporosity and microbial retention on the and not on the Williams Sonoma.
  • We flag Glaze degradation and crazing over time and Microbial growth in porous material on the Williams Sonoma and not on the .
  • The is Ceramic (clay-based baking stone) where the Williams Sonoma is Ceramic (Emile Henry stoneware), which is most of the difference in these two grades.
  • The gap is 25 points, wide enough that this is not a close call, and the is the one to buy.

Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →

More pizza stones & baking surfaces: see the full ranking