Chalcophanite, Cryptomelane
Herdade dos Pendões Mine, São Luís, Odemira, Beja, Portugal
Group of iridescent chalcophanite crystals (unusual for the species), with very small cryptomelane spheres.
EDS and XRD analyzed.
This image was originally published in:
Alves, P. and Kampf, A.R. (2017) A mina de ferro e manganês da Herdade dos Pendões, Odemira, sudoeste de Portugal. Acopios, 8: 17-62.
© Pedro Alves