Parent Paper: Geochemical and petrological characterization of gem opals from Wegel Tena, Wollo, Ethiopia: opal formation in an Oligocene soil
B. Rondeau, B. Cenki-Tok, E. Fritsch, F. Mazzero, J-P Gauthier, Y. Bodeur, E. Bekele, E. Gaillou & D. Ayalew
Geochemistry: Exploration, Environment, Analysis, Vol. 12. No2, 2012.
http://dx.doi.org/10.1144/1467-7873/10-MINDEP-058
The totality of the chemical analysis is provided as a .csv file.