Locality: Huanzala Mine, Huallanca, Huallanca District, Bolognesi Province, Ancash Department, Peru
Size: 59 mm x 48 mm x 20 mm (2.3 in. x 1.9 in. x 0.8 in.)
Weight: 75 g (2.6 oz.)
Specimen formed by dark gray tabular crystals of wurtzite (zinc and iron sulfide), with translucent white baryte (barite), also tabular, to 8 mm.