Fig. 6
Bivariate plot of MnO-Ba, showing the elevated level of Ba in the manganese- and copper-coloured dark blue and black glass samples of a m-Na-Al low Al low Ca glass composition
Fig. 6 | Heritage Science
Bivariate plot of MnO-Ba, showing the elevated level of Ba in the manganese- and copper-coloured dark blue and black glass samples of a m-Na-Al low Al low Ca glass composition
