A high concentrated glass bead, with a flux to sample ratio of two to one, was prepared to evaluate the potential for major and trace element analyses of various silicate rocks by X-ray fluorescence spectrometry. Careful instrument set up, matrix effect and peak overlap corrections allowed enhanced accuracy of analysis. The accuracy reached a level comparable to that of using five to one glass beads for major elements and pressed powder pellets for trace elements. Using this method, major and trace element analyses were possible using one single glass bead.