Heritage Science

Table 3 Analyses performed on tesserae from the mosaic on the front of the San Giovenale chapel (Narni)

From: Obsidian use in the mosaic of the St. Juvenal church, Narni (Italy): chemical characterization and origin

	Colour	Description	XRF	ITNAA
1	blue-green	transparent	*
2	blue-green	transparent	*
3	blue-green	transparent	*
4	blue-green	transparent	*
5	blue-green	transparent	*
6	light blue	translucent	*
7	light blue	translucent	*
8	light blue	translucent	*
9	light blue	translucent	*
10	light blue	translucent	*
11	dark blue	opaque	*
12	black	obsidian	*	*
13	black	obsidian	*
14	black	obsidian	*	*
15	white	limestone	*
16	colourless	transparent	*
17	colourless	transparent	*

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