About: http://webisa.webdatacommons.org/450955493

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Many times the silver plating is so thin that it can be scratched off by hard objects such as a coin or paperclip.
http://www.w3.org/ns/prov#wasQuotedFrom	precious-metal-refining.info