About: http://webisa.webdatacommons.org/199709503

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	Hornblende, epidote, garnet, and plagioclase are the most common minerals that carry significant calcium.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov