Thin, pale green crusts of adamite line the fracture surfaces that form the front and back of this specimen from Sterling Hill. The matrix is granular franklinite-calcite ore. Minor blue azurite has replaced some of the calcite in the ore, and a little secondary willemite (revealed only by its fluorescence) lines the same fracture faces as the adamite. Steven Phillips collection.
Identifier: ADM1a Locality: 50 ft above 340 level, mud zone, Sterling mine, Ogdensburg Specimen size: 7.5 x 6 x 4.5 cm Photo credit: Earl R. Verbeek