About: http://webisa.webdatacommons.org/8678375

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	Amethyst is a variety of quartz which owes its coloration to the presence of iron in the area of its formation.
http://www.w3.org/ns/prov#wasQuotedFrom	davesrockshop.com