1. Title of Dataset: Dataset on interacting spheres settling through rheological transition Data were collected in the Warsaw Univesity of Technology, Faculty of Chemistry 2. Folder List: Folder Rheological_data contains 4 csv files containing flow data: AS36_XG0.5.csv AS36_XG1.csv AS42_XG0.5.csv AS42_XG1.csv Names refer to solutions - each solution was composed of artificial seawater (AS) preraped according to a standard (ASTM, 2013. Standard Practice for the Preparation of Substitute Ocean Water) and dissolved polymer: XG - xanthan gum two concentrations 0.5 g/L and 1 g/L. 3. Additional related data collected that was not included in the current data package: Data on settling of partices in solutions stored in Settling_experiments folder and data on particles' dimensions stored in Dimension_of_particles folder. 4. Methodological information: MCR 301 rheometer with coaxial cylinders measuring geometry (CC17-SN12952, 0.714 mm gap) featuring a built-in Peltier device for temperature control at 21 °C. Flow curves were measured in the controlled shear rate (CSR) mode. 5. Data-specific information: *.csv files contain the following variables: Shear Rate [1/s],Shear Stress [Pa], Viscosity [Pa s],1st Normal Stress Difference [Pa],Speed [1/min]