linkedin post 2021-03-06 05:05:36

ROASTED GYPSUM OR ALABASTER is CaSO4·2H2O + heat –> CaSO4.1/2 H2O (plaster of Paris). In mediaeval England there were extensive mines at Nottingham that was the source of an extraordinary alabaster used in church figures all over Europe that had the quality of ivory.” It was not commonly found throughout the UK, and limited to selected areas.

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