About: http://webisa.webdatacommons.org/113978278

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	Compare them and put them in groups according to physical properties such as color, texture, luster, hardness, or crystals.
http://www.w3.org/ns/prov#wasQuotedFrom	usssp.net