Classification Species: Mottramite Formula: PbCu(VO4 )(OH) Comments: Occurs as fibrous layers to 0.5 inches (1.25 mm) thick, enclosed in crystallized calcite, which, in turn, may be covered by a layer of amber-colored indistinct crystals. Colour: Reddish, chestnut-brown, amber Confirmation Validity: Believed Valid Associated Minerals: Associates: Calcite Data Mineral Data: Click here to view Mottramite data Locality Data: Click here to view Unspecified locality, Nogales area, Santa Cruz County, Arizona, USA Data Identifiers Mindat Occurrence Record ID: 245369 Long-form Identifier: 1:3:245369:9 GUID (UUID V4 ): 0 References Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons. Search for references including Mottramite Unspecified locality, Nogales area, Santa Cruz County, Arizona, USA