About: http://webisa.webdatacommons.org/336665470

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 / Ruby Sapphire is a high purity and density, single crystalline form of aluminum oxide, which may contain chromia, titania, yttria or other dopants.
http://www.w3.org/ns/prov#wasQuotedFrom	globalspec.com