About: http://webisa.webdatacommons.org/432288678

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	If it is just on the surface and is an iron stain you can probably remove it with a Waller solution.
http://www.w3.org/ns/prov#wasQuotedFrom	mindat.org