Specimen data for Bismutite

Tom Mortimer catalog number: 529

Identification method: Disolves with effervescence in cold muriatic acid, proving a carbonate. Dana's "System of Mineralogy" vol 2, pgs 260, 261 states "Bismutite is a typical alteration product of bismuthinite." It is "formed by alteration under superficial conditions"... "often as opaline crusts"

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