Superlative quality copper with rich tenorite and cuprite patina. Fantastic variety of crystal forms dominated by tetrahexahedrons: both single xls and parallel growth on twins (see dominant 1.2 cm triangular shaped xl at top center). No point of attachment. Associated lustrous apophyllite xls. Provenance: Don Gabriel collection; Van Scriver Minerals; Robert Harringer collection; North Star Minerals; Wouter van Tichelen Collection. Beautiful and pristine copper from mining c. 1860s-1880s.