About: http://webisa.webdatacommons.org/275391249

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	Sapphire is a naturally growing crystal and is the second hardest substance on earth.
http://www.w3.org/ns/prov#wasQuotedFrom	displayalliance.com