About: http://webisa.webdatacommons.org/166124407

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	This compares with natural diamonds which are carbon crystals of varying purity and may contain up to 20 percent ash consisting mainly of oxides of silicon, iron, calcium, magnesium, aluminum and titanium.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au