About: http://webisa.webdatacommons.org/136094585

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	Certain ores (Platinum, Palladium, Iridium, Osmium, Ruthenium, Nickel, Cobalt, Tin, Arsenic, Copper, Bismuth, and many others, including Gold and Silver) may look just like common Iron Pyrites, and are discarded as worthless.
http://www.w3.org/ns/prov#wasQuotedFrom	northeastmetaldetectingforum.com