What is the type of coating? ceramic or granite?

All cookware(except dutch oven) in Carote store is made with granite stone delivered coating, in 5 layers they're triple food-grade reinforced layers, high-grade natural mineral coating & Die-Cast Aluminum inner layer.
We cooperated with swiss ILAG and imported coating materials from Swiss, kindly check ILAG's official website if you'd like to check more details of coating.
https://www.ilag.ch/en/product/durit-granitec-hl-special-effect-line.html