About: http://webisa.webdatacommons.org/415777655

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	characteristic color of such minerals as smoky quartz and amethyst is due to the coexistence of the proper chemical and
http://www.w3.org/ns/prov#wasQuotedFrom	minsocam.org