“Calcite with Graphite and Pyrite included.
Specimen size: 16 x 10 x 7.5 cm.
From "Peñas Azules" Deposit, Sierra Calcaquí, Amaicha del Valle District, Tafí del Valle Department, Province of Tucumán, Argentina.
Collected in 70´s.
Raúl Jorge Tauber Larry´s collection.”
Raúl Jorge Tauber Larry - 26th June 2012