Distribution of the Sands graphite on stone paper, 21×29,5 cm, 2016 Frottages of the Samples Museo di Palazzo Poggi, BolognaPalazzetto Tito, VeniceFrottages Thin sectionsEvaluation of the Fine Dust Sassi/Stones. Reading the rock mariateresa sartori2017-02-19T17:43:05+00:00