“Graphite (sheet of 2 mm) with Calcite included.
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