also: ストーンウエア
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.
陶器 is a broader term for pottery and ceramics, while ストーンウェア specifically refers to stoneware, a dense, high-fired ceramic.
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'.