About: http://webisa.webdatacommons.org/65965034

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	There are other ways to restore color to gems, i.e. feeding them, but in general that is a sign they are just rendering to quartz like they would have in nature.
http://www.w3.org/ns/prov#wasQuotedFrom	tarotforum.net