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| Name: | "the Pennant Collection (pre-1773) contains specimens of fibrous gypsum from Nottingham & Derbyshire which are all registered in the original Pennant catalogue as "Plaister Stone" - interestingly it is a term that appears to be used only for the fibrous variety of gypsum that we would now call "satin spar". - Mike Rumsey, pers. Comm (2008) | ||
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| Synonym of: | Satin Spar Gypsum | ||
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