Comparison of fineware surface treatment by style. The lower sherds are (e) imported Tiwanaku showing highly smoothed and burnished surfaces. All vessels from Piñami.
Isbell, William H.; Uribe, Mauricio I.; Tiballi, Anne; Edward P. Zegarra, 2018, "Visual database", https://doi.org/10.25346/S6/1B33FN.