About: http://webisa.webdatacommons.org/325846994

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	Viewers learn that fluorescence commonly is due to inorganic chemical impurities, generally of metallic elements such as manganese, titanium, and the rare-earth metals, but occasionally of nonmetallic elements as well.
http://www.w3.org/ns/prov#wasQuotedFrom	sterlinghillminingmuseum.org