About: http://webisa.webdatacommons.org/310447220

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	Whatever they are, they and the rest of the pieces are not polished very well and virtually all the parts have a ???rough??? surface finish under magnification.
http://www.w3.org/ns/prov#wasQuotedFrom	nawcc.org