Specimen of dark gray material and brown powdery limonite with radiating clusters of bright pink to purple acicular crystals of erythrite, as well as tiny pale pink encrusting crystals of erythrite.
- Cooper, Thomas, 1759-1839
- University of South Carolina. McKissick Museum.
- Tunaberg, Nyk'ping, S'dermanland, Sweden
- Historic Southern Naturalists