About: http://webisa.webdatacommons.org/39275504

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 an aluminum oxide, a variety of corundum; it occurs in medium to dark tones of red and violetish-red to brownish-red
http://www.w3.org/ns/prov#wasQuotedFrom	fine-gems.com