TH27AL9: Group of ‘Pearceite’ crystals with sharp faces and edges, and very marked striations, shiny and aesthetically centered on its matrix of white Calcite crystals. We label the species with quotation marks around 'Pearceite' due to the changes introduced by the IMA in the nomenclature of the species, which was recently subdivided.
Uchucchacua Mine, Oyón Province, Lima Department  Peru

Specimen size: 3.9 × 2 × 1,9 cm = 1.54” × 0.79” × 0.39”

Main crystal size: 0.4 × 0.3 cm = 0.16” × 0.12”