Fig. 4From: Islamic copper-based metal artefacts from the Garb al-Andalus. A multidisciplinary approach on the Alcáçova of Mārtulah (Mértola, South of Portugal)Zinc and tin contents in all the artefacts analyse from Mértola sorted according to the type of alloy. The lines define the areas of each type of alloy, i.e., brass, copper, red brass, and bronzeBack to article page