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Dear all, I am looking to prepare rock samples for analysis on a machine more commonly used for metals and ceramics that needs v small samples - cylinders 12.5mm in a diameter and 2-3mm in thickness. Some of my samples are very friable. I can either cut out a cylinder of rock with a water jet then slice to the correct thickness or use a multi-cut core drill with an inner diameter of 12mm. The latter option is cheaper per sample, but I am concerned the samples may fall to pieces. Does anyone have any advice on which technique would be best - or alternatives? Any advice welcome. Thank you, Lucy McKay PhD Student Department of Civil and Environmental Engineering University of Strathclyde Level 5 - James Weir Building 75 Montrose Street Glasgow G1 1XJ E-Mail: [log in to unmask]<mailto:[log in to unmask]>