PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A hallmark is a indication of, the quality or standard of the precious metal it is stamped on and, on sterling silver, usually gives some indication of the date the piece was created, where it was created as well as the initials of the maker.Most silver coins and bars usually have a silver content of .999 fineness and 99.5 percent silver.
http://www.w3.org/ns/prov#wasQuotedFrom
  • silverprice.org