Figure 2

Comparison of results obtained using the wet sieving technique and the dry sieving technique. The wet sieving technique was successful in eliminating the aggregation of smaller size particles, achieving a narrow range of particle sizes for all samples, and removing adhering particles from the pyrite surface. a) Dry sieved, 63–75 μm, hydrothermal pyrite sample, HY-001, 63–75 μm, and b) HY-001, wet sieved, target size fraction 63–75 μm. c) Dry sieved, 44–75 μm, sedimentary pyrite sample, SED-002, and d) SED-002, wet sieved, target size fraction 44–75 μm.