Lot 248: A rare large mineral/crystal specimen


2015-11-05 11:28:23


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Lot 248: Mineral/Crystal specimen. A rare large mineral/crystal specimen, Selenite on Quartz Geode, America, 47 cm high Selenite is one of four varieties of the mineral gypsum. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate. (1) Dominic Winter's Travel & Natural History Maps, Prints & Sporting Art Early Printed Books Military History Wednesday, 11th November 2015 Estimate: £100-150
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