About: http://webisa.webdatacommons.org/217710134

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	It includes 6 minerals and 6 each of the three types of rock - igneous, metamorphic and sedimentary.
http://www.w3.org/ns/prov#wasQuotedFrom	rocksandminerals.com