Heritage Science

Table 6 Information on chromophores and opacifiers with the indication of the methods that provided the information

From: An archaeometric contribution to the interpretation of blue-green glass beads from Iron age Central Italy

	Samples	Chromophore(s)/Opacifier	Technique for confirmation
RED	VG24, 25, 26, 29	Cu⁰	FORS, p-XRF
GREEN	PG65, 121, 122, 160, 161, 166, 169	Cu²⁺, Fe³⁺	FORS, p-XRF, LA-ICP-MS
DARK-GREEN	PG84, 87, 162, 163, 164, 167, VG25	Cu²⁺, Fe³⁺	FORS, p-XRF, LA-ICP-MS
BLUE-GREEN	PG110_1, PG112	Cu²⁺, Fe³⁺	FORS, p-XRF, LA-ICP-MS
BLUE	PG33, 39, 59, 60, 63, 88, 89, 97, 116, 136, 170, VG28	Cu²⁺, Fe³⁺	FORS, p-XRF, LA-ICP-MS
Co–Cu BLUE	PG109, 111, 138, VG106	Co²⁺, Cu²⁺, Fe³⁺, Fe²⁺	FORS, p-XRF, LA-ICP-MS
Co BLUE	PG168, 171	Co²⁺ Fe³⁺ Fe²⁺	FORS, p-XRF
DARK	PG158, 159, VG22, 23	Co²⁺, Fe²⁺, Fe³⁺	FORS, p-XRF, LA-ICP-MS
WHITE 1	PG109, 110_1, 111, 112, 138, 170, VG 106	CaSb₂O₆	p-XRF, SEM–EDS, µ-Raman, LA-ICP-MS
WHITE 2	PG84, 167, VG25, 26, 29	Fine bubbles	OM, p-XRF, µ-Raman, LA-ICP-MS
YELLOW	PG59, 60, 122, 166	Pb₂Sb₂O₇	p-XRF, µ-Raman, LA-ICP-MS

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