Fig. 3From: Unravelling the glass trade bead sequence from Magoro Hill, South Africa: separating pre-seventeenth-century Asian imports from later European counterpartsPlot of the wavenumber maxima of the bending (δmaxSi-O) and stretching (νmaxSi-O) bands of the Raman spectra of the beads classified according to morphological parameters. Colour fill represents the colour of the beadsBack to article page