The reverse side of the magnussonite specimen MGN4a, showing intergrown, flattened, radial groups of mcgovernite crystals atop a film of calcite.
Identifier: MGN4b Locality: 1020 Stope, 10 ft below 1100 level, west limb, Sterling mine, Ogdensburg Specimen size: 6 x 4 x 2 cm Photo credit: Earl R. Verbeek
