About: http://webisa.webdatacommons.org/186120300

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	According to the Virtual Geology Museum sponsored by Cochise College, amethyst is a variety of quartz mined in South America, Africa and a number of other countries.
http://www.w3.org/ns/prov#wasQuotedFrom	issuu.com