About: http://webisa.webdatacommons.org/55060641

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	When this happens, the result is a stone with a bluish-gray color (and often with streaks or overtones of brown or yellow), but still with chatoyant effect.
http://www.w3.org/ns/prov#wasQuotedFrom	minerals.net