The marbles of the Ludovisi and Capitoline Gauls
The marbles of four ancient sculptures of the Attalid Dedication in Pergamon were investigated. The isotopic composition of the fine-grained marble overlaps isotopically completely with the fine-grained Göktepe marbles.
Trace element composition (especially Sr and Fe) can perfectly distinguish between the Dokimion and the Göktepe marbles. Thus the "big galati" are clearly assigned to the marbles of Afyon/Dokimion.
Attanasio, D., Bruno, M., and Prochaska W.: The Dokimian Marble of the Ludovisi and Capitoline Gauls and Other Replicas of the Pergamene Dedications. - American Journal of Archaeology, v. 115,4, 575-587, 2011.