Fig. 4From: Unravelling the glass trade bead sequence from Magoro Hill, South Africa: separating pre-seventeenth-century Asian imports from later European counterpartsRepresentative Raman baseline subtracted spectra of beads that fall into a the soda glass group and b the soda-lime group (top). c, d Pigments and other crystalline phases identified through their Raman spectra (bottom)Back to article page