Tesaurus d'Art i Arquitectura Getty Institute 0000-00-00 2024-01-24 15:40:44 en slate300011646slatestonewriting slate A very fine-grained, foliated, non-layered metamorphic rock, generally produced by metamorphism of shale under relatively low pressure and temperature. It occurs in many varieties, including clay, hornblende, mica, talc slate, and others, all of which have the common property of splitting readily into thin plates. pissarra pizarra 2026-03-30 20:41:16