stoneware

n. hard pottery made from a type of clay containing large amounts of silica or flint

Stoneware is a category of clay and a type of ceramic distinguished primarily by its firing and maturation temperature (from about 1200°C to 1315 °C). In essence, it is man-made stone. One widely recognized definition is from the Combined Nomenclature of the European Communities which states, "Stoneware, which, though dense, impermeable and hard enough to resist scratching by a steel point, differs from porcelain because it is more opaque, and normally only partially vitrified. It may be vitreous or semi-vitreous. It is usually coloured grey or brownish because of impurities in the clay used for its manufacture, and is normally glazed".
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Noun
1. ceramic ware that is fired in high heat and vitrified and nonporous
(hypernym) ceramic ware

(n.)
A species of coarse potter's ware, glazed and baked.
  

Synonyms and related words:
appliances, brassware, chinaware, clayware, copperware, dinnerware, durable goods, durables, earthenware, enamelware, fixtures, flatware, glassware, graniteware, hard goods, hardware, hollow ware, housefurnishings, housewares, ironmongery, ironware, kitchenware, metalware, ovenware, silverware, sporting goods, tableware, tinware, tools and machinery, white goods, woodenware