[Rupert’s metal]
Alloy of about three parts of copper and one of zinc, in colour resembling gold. It was made in England from the 17th century, and used mostly for inexpensive jewellery. It is also known as Prince Rupert’s metal and Rupert’s metal. In the Islamic world, it is known as tombak...
In its most general sense, spolia (pl., from Lat. spolium: ‘plunder’) denotes all artifacts re-employed in secondary contexts, from building blocks reused in a wall to pagan gems mounted on a Christian reliquary. It is a matter of debate whether this broad application of the term is justified, or whether it should be restricted to the relatively small subset of reused objects that were taken or ‘stripped’ (like spoils) from their original context, rather than found, purchased, inherited or otherwise acquired by non-violent means. It is likewise debated when the use of spolia should be considered meaningful, if at all. Arnold Esch defined five possible motives for using spolia: convenience, profanation, Christianization, political legitimation and aesthetic attraction. Michael Greenhalgh has argued for reducing the motives to three (at least with regard to marble): pragmatism, aesthetics and ideology; while Finbarr Barry Flood cautioned against reductive interpretations generated by any taxonomy, insisting that reused objects are mutable in meaning and capable of multiple interpretations during their life cycle....
