About: http://webisa.webdatacommons.org/208028361

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	Ruby is a variety of corundum, a mineral whose chemical formula is Al2O3, basically aluminum oxide.
http://www.w3.org/ns/prov#wasQuotedFrom	crystalflame.com