A gorgeous specimen from the Smithsonian Institution, featuring a large mass of very fine-grained (“cherty”), deep pink to brownish-pink sussexite bordered by nearly white calcite. The bottom third of the specimen is mostly altered ore consisting of franklinite (black), calcite (white), and willemite (brown). The willemite has probably been replaced largely by serpentine. A black-and-white version of this photograph appeared as Figure 24-17 on p. 643 in Dunn (1995). The specimen is no. R15679 of the Smithsonian Institution.
Identifier: SSX33a Locality: South limb of the North Orebody, Sterling mine, Ogdensburg Specimen size: 21 cm in maximum dimension Photo credit: Pete J. Dunn