A type of ceramic or stoneware; a hard, high-fired pottery or earthenware.
From French 'grès' (stoneware), possibly from Old German 'greot' or related to grinding/grain concepts, referring to granular texture.
Gres stoneware represents a sweet spot in pottery where clay becomes nearly impervious without being as brittle as porcelain—medieval potters discovered this through experimentation rather than science.
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