S. C. HAWKES’s research while affiliated with Oxford Archaeology and other places

... In Fig. 10 the concentrations of copper and silver entering in the composition of gold jewellery and gold coins produced in the Mediterranean area in the Byzantine and Early Islamic periods are reported (for the late Roman and Byzantine coins: Metcalf and Schweizer, 1970;Hawkes et al., 1966;Oddy, 1988;Oddy and Hughes, 1975;Grierson and Blackburn, 1986;Morrisson et al., 1985;Arslan et al., 1983;Guest, 2005;Blet-Lemarquand et al., 2010;Bartlett et al., 2011;Hall and Metcalf, 1988; for the Early Islamic period: Gondonneau and ; for the jewellery: Ross, 1962;Oddy and La Niece, 1986;Yeroulanou, 1999;Johns, 2011). As expected (Guerra et al., 2007), most of the jewellery items contain higher Cu contents than the coins; from the diagram it can also be observed that the Byzantine and the Early Islamic coins are made from the same gold alloys (Gondonneau and . ...

Reference:

Glass and gold: Analyses of 4th–12th centuries Levantine mosaic tesserae. A contribution to technological and chronological knowledge