Stoneware

Stoneware is a broad term for pottery or other ceramics fired at a relatively high temperature. It may or may not be glazed. It was developed after earthenware and before porcelain. Stoneware can be made from a much wider range of clays than porcelain.
Historically, reaching high temperatures was a big challenge. Lower temperatures were used for a long time. Earthenware can be fired as low as 600°C. This was done in primitive pit firing, but to was more typical. 
As a rough guide, modern earthenwares are normally fired in a kiln at temperatures in the range of about 1,000°C (1,830 °F) to ; stonewares at between about to ; and porcelains at between about to .