These pieces from Iran surprisingly
date from the 12th century. They are crafted of molded and glazed "stonepaste."
Islamic stone-paste, also called fritware and quartz frit, is a ceramic material which seems to have been first manufactured in Iraq in the 9th century... made by combining clay with quartz or other siliceous material, as well as glass frit, to which is adjoined an organic compound such as gum or glue for binding...
Islamic stone-paste was invented to give a stronger body to its pottery material, which, combined with tin-glazing of the surface, allowed it to approximate the result of Chinese porcelain.
From the collections of the
Metropolitan Museum of Art, via
A London Salmagundi.
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