PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The naturally-occurring metal known as electrum is an alloy of gold, platinum and silver, with trace amounts of copper and other metals, giving electrum a warm, moonlight-tinged hue of pale to bright yellow.
http://www.w3.org/ns/prov#wasQuotedFrom
  • allaboutgemstones.com