About: http://webisa.webdatacommons.org/301072920

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 material known, defining the upper end of the 1-10 scale known as Moh's hardness.
http://www.w3.org/ns/prov#wasQuotedFrom	chem1.com