About: http://webisa.webdatacommons.org/4904991

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	Hundreds of types of rocks are found on Earth, each with their own chemical composition, physical structure and formation.
http://www.w3.org/ns/prov#wasQuotedFrom	chinagrindingmill.net