About: http://webisa.webdatacommons.org/248553477

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	Diamond is the hardest known substance. ???You end up grinding PCD with a diamond grinding wheel, a process in which the amount of material removed from the workpiece and wheel is about equal,??? Mr. Buchenroth explains.
http://www.w3.org/ns/prov#wasQuotedFrom	mmsonline.com