About: http://webisa.webdatacommons.org/260330446

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, while cubic boron nitride (BN) is the second-hardest.
http://www.w3.org/ns/prov#wasQuotedFrom	boundless.com