also: ストーンウエア
noun
stoneware
A type of pottery fired at high temperatures, making it hard, non-porous, and durable. Used for dishes, mugs, and cookware.
このマグカップはストーンウェアでできている。
This mug is made of stoneware.
磁器 (porcelain) is fired at even higher temperatures and is more translucent and refined than ストーンウェア.
Loanword from English 'stoneware'.