About: http://webisa.webdatacommons.org/127506283

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, like ruby, is a variety of corundum; it gains its color from one or more metallic oxides that appear in the mineral as impurities.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org