6071gypsumTTen-USVocabulário Colaborativo em Artes e Arquitetura active approved gypsumNaturally occurring soft white mineral that is commonly used as a retarding agent in portland cement, as a core in sheets of wallboard, as a white pigment, in grounds for paintings, and is the main component of alabaster.

Source: AAT

http://vocab.getty.edu/page/aat/300011099

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