Analytical data for 31 elements in 8 Japanese, 12 South African and 5 Belgian Reference Materials of igneous and (meta‐) sedimentary origin are reported. These data have been obtained by Inductively Coupled Plasma‐Atomic Emission Spectrometry (ICP‐AES). For most samples, relative standard deviations are in the range 0.5–3% for major elements, 2–10% for minor elements, and equal to or better than 5% for the REE. Accuracies, as estimated from a comparison with recommended values, are about 10%