About: http://webisa.webdatacommons.org/409902961

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	These are caused by a combination of different absorption and reflectance of the various minerals that comprise the specimen and surrounding matrix or other factors.
http://www.w3.org/ns/prov#wasQuotedFrom	plos.org